The physicist Richard Gott defends the Copernican principle, which claims that when we have no information about our position along a given dimension among a group of observers, we should consider ourselves to be randomly located among those observers in respect to that dimension. First, I apply Copernican reasoning to the distribution of evil in the universe. I then contend that evidence for intelligent extraterrestrial life strengthens four important versions of the argument from evil. I remain neutral regarding whether (...) this result is a reductio of these arguments from evil or the statement of a genuine evidential relationship. (shrink)

The recent explosion in the discovery of exoplanets and our incipient ability to detect atmospheric biomarkers recommend reflection on the conceptual implications of discovering – or not discovering – extrasolar life. I contend that evidence for intelligent extraterrestrial life is evidence against the existence of God, because if there are intelligent extraterrestrials, there are likely to be evils in the universe even greater than those found on Earth. My reasoning is based on Richard Gott's Copernican Principle, which (...) holds that in the absence of information to the contrary, we should take ourselves to be typical observers. (shrink)

Copernican reasoning involves considering ourselves, in the absence of other information, to be randomly selected members of a reference class. Consider the reference class intelligent observers. If there are extraterrestrial intelligences (ETIs), taking ourselves to be randomly selected intelligent observers leads to the conclusion that it is likely the Earth has a larger population size than the typical planet inhabited by intelligent life, for the same reason that a randomly selected human is likely to come from a (...) more populous country. The astrophysicist Fergus Simpson contends that this reasoning supports the claims that the typical planet inhabited by ETIs is smaller than Earth (radius about 5,000km; cf. Earth's radius = 6,371km) and that the typical ETI is significantly larger than us about 314kg, the size of an adult male grizzly bear). Simpson's applications of Copernican reasoning are novel and exciting. They should be of interest to philosophers concerned with Richard Gott's delta t argument, the N=1 problem in astrobiology, limited principles of indifference, and probabilistic epistemology in general. While we agree with Simpson about the qualitative direction of his conclusions, we take issue with his presentation of precise quantitative results because his methods (1) display bias, (2) ignore other variables contributing to population size, (3) commit an equivocation, and (4) conceal their dependence on arbitrary assumptions. (shrink)

We consider the Search for ExtraTerrestrial Intelligence (SETI) activities from a bioethical standpoint. In particular, we argue that there is a moral duty to search for other intelligent beings in the Universe. Some of them could – and are likely to be – morally enhanced in the sense that they are not only capable of unmistakable moral reasoning but are also capable of consistently acting upon the results of such deliberations. Even if the probability of finding such morally superior (...) beings is small, it is higher than zero in any case; in fact, our astrobiological knowledge suggests that this probability is significant. Hence, there are both deductive and inductive arguments for the proposition that our duty is to search for such morally superior extraterrestrial beings. In other words, there is a duty to undertake and support our SETI efforts. The argument to that effect runs parallel to some of the arguments deployed in current debates on human moral enhancement. (shrink)

Avi Loeb has defended the hypothesis that the interstellar object, ‘Oumuamua, detected in 2017, is in fact an extraterrestrial artefact. His hypothesis has been widely rejected by the scientific community. On examination however it is not clear why. The puzzle is at the level of argument structure. The scientific community's responses to Loeb's hypothesis appear to point to explanations of ‘Oumuamua's properties that are mere possibilities. Yet this is something that Loeb does not contest. I appeal to broadly philosophical considerations (...) to understand and bolster the response to Loeb. These considerations concern the structure of his argument, the role of prior confidences within it, and the presence of ‘unconceived alternative’ explanations. I then generalise. ‘Oumuamua will surely not be the last object that does not admit of straightforward natural explanation and that is claimed to be evidence of an extraterrestrial artefact. I use the preceding discussion of Loeb's argument and the scientific community's response to make some general remarks for future debate about similar cases. (shrink)

To understand the possible forms of extraterrestrial intelligence, we need not only astrobiology theories about how life evolves given habitable planets, but also evolutionary psychology theories about how intelligence emerges given life. Wherever intelligent organisms evolve, they are likely to face similar behavioral challenges in their physical and social worlds. The cognitive mechanisms that arise to meet these challenges may then be copied, repurposed, and shaped by further evolutionary selection to deal with more abstract, higher-level cognitive tasks such as (...) conceptual reasoning, symbolic communication, and technological innovation, while retaining traces of the earlier adaptations for solving physical and social problems. These traces of evolutionary pathways may be leveraged to gain insight into the likely cognitive processes of ETIs. We demonstrate such analysis in the domain of search strategies and show its application in the domains of emotional aversions and social/sexual signaling. Knowing the likely evolutionary pathways to intelligence will help us to better search for and process any alien signals from the search for ETIs and to assess the likely benefits, costs, and risks of humans actively messaging ETIs. (shrink)

Extraterrestrial Altruism examines a basic assumption of the Search for Extraterrestrial Intelligence (SETI): that extraterrestrials will be transmitting messages to us for our benefit. This question of whether extraterrestrials will be altruistic has become increasingly important in recent years as SETI scientists have begun contemplating transmissions from Earth to make contact. Technological civilizations that transmit signals for the benefit of others, but with no immediate gain for themselves, certainly seem to be altruistic. But does this make biological sense? (...) Should we expect altruism to evolve throughout the cosmos, or is this only wishful thinking? Is it dangerous to send messages to other worlds, as Stephen Hawking has suggested, or might humankind benefit from an exchange with intelligence elsewhere in the galaxy? Would extraterrestrial societies be based on different ethical principles, or would we see commonalities with Earthly notions of morality? Extraterrestrial Altruism explores these and related questions about the motivations of civilizations beyond Earth, providing new insights that are critical for SETI. Chapters are authored by leading scholars from diverse disciplines—anthropology, astronomy, biology, chemistry, computer science, cosmology, engineering, history of science, law, philosophy, psychology, public policy, and sociology. The book is carefully edited by Douglas Vakoch, Director of Interstellar Message Composition at the SETI Institute and professor of clinical psychology at the California Institute of Integral Studies. The Foreword is by Frank Drake. This interdisciplinary book will benefit everybody trying to understand whether evolution and ethics are unique to Earth, or whether they are built into the fabric of the universe. (shrink)

If the discovery of life elsewhere in the universe is just around the corner, what would be the consequences for religion? Would it represent another major conflict between science and religion, even leading to the death of faith? Some would suggest that the discovery of any suggestion of extraterrestrial life would have a greater impact than even the Copernican and Darwinian revolutions. It is now over 50 years since the first modern scientific papers were published on the search for extraterrestrial (...) intelligence. Yet the religious implications of this search and possible discovery have never been systematically addressed in the scientific or theological arena. SETI is now entering its most important era of scientific development. New observation techniques are leading to the discovery of extra-solar planets daily, and the Kepler mission has already collected over 1000 planetary candidates. This deluge of data is transforming the scientific and popular view of the existence of extraterrestrial intelligence. Earth-like planets outside of our solar system can now be identified and searched for signs of life. Now is a crucial time to assess the scientific and theological questions behind this search. This book sets out the scientific arguments undergirding SETI, with particular attention to the uncertainties in arguments and the strength of the data already assembled. It assesses not only the discovery of planets but other areas such as the Fermi paradox, the origin and evolution of intelligent life, and current SETI strategies. In all of this it reflects on how these questions are shaped by history and pop culture and their relationship with religion, especially Christian theology. It is argued that theologians need to take seriously SETI and to examine some central doctrines such as creation, incarnation, revelation, and salvation in the light of the possibility of extraterrestrial life. (shrink)

Bible and tradition remain silent on intelligent extraterrestrial life, and few modern theologians have expressed themselves on this topic. Scientific insight suggests the possibility, even likelihood, of the development of life on extrasolar earthlike planets. It is argued that such life forms would resemble earthly life and also develop a religious and moral life. As creatures with free will they would be prone to sin and in need of salvation. It is argued that this would not require multiple incarnations, (...) since Jesus is the cosmic Christ. (shrink)

My topic is extraterrestrial intelligence. Following current conventions, I use the abbreviation ‘ETI’ to stand for three related concepts: the abstract idea of extraterrestrial intelligence, individuals who are both extraterrestrial and intelligent, and the hypothesis that there are ETIs. SETI is the search for ETIs, and CETI is the attempt to communicate with ETIs. In this paper, I will try to answer the two most basic questions in extraterrestrial studies. First, what is the status of the ETI hypothesis? In (...) the light of what we know, how likely is it that there are ETIs? Secondly, what is the value of pursuing SETI? Are the expected epistemic and pragmatic payoffs sufficient to warrant an extensive search? The first, substantive question is discussed in Section 2, Section 3 and Section 4. The second, ‘program evaluation’ question is the subject of Section 5 and Section 6. But first we'll take a brief look at some of the early history of the topic. (shrink)

Public theology is conceived in the church, reflected on critically in the academy and addressed to the world for the sake of the world. The development of a theology of nature is included in the public theologian’s list of tasks of nature that is scripturally based and heavily informed by the natural sciences. Astrotheology is one product. Astrotheology engages astrobiology and other space sciences, firstly, by critically exposing the extraterrestrial intelligence myth at the heart of science and secondly, by partnering (...) in thinking through public policy proposals with astroethicists.Contribution: The HTS collection on ‘Theology and Nature’ sparks theological discussion both within and beyond the church. By developing the fields of astrotheology and astroethics, this article contributes to a ‘Theology of Nature’ as an exercise in Public Theology. (shrink)

Arguments favoring the existence of extraterrestrial intelligence nearly always contain an overt appeal to big numbers, often combined with a covert reliance on generalization from a single instance. In this paper I examine both motifs, and consider whether big numbers might actually make palatable otherwise implausible single-case inductions. In the end, the dispute between believers and skeptics is seen to boil down to a conflict of intuitions which can barely be engaged, let alone resolved, given our present state of knowledge.

The scientific search for extraterrestrial intelligent life is probably one of the most ambitious projects ever taken in biology. The article discusses methodological problems associated with the search. It is emphasized that investigators of extraterrestrial intelligence, in contrast to investigators of terrestrial matters, have no valid pre-understanding of their subject matter. In this barren setting, utilization of semiotic knowledge is shown to be a prerequisite for achievement of valid data. Owing to methodological shortcomings, it is concluded that the NASA (...) funded project SETI (Search for Extraterrestrial Intelligence) has little if any relevance for the detection of intelligent life in other worlds. (shrink)

This article compares justifications of the search for extraterrestrial intelligence (SETI) presented by scientists with ideational constructs associated with cargo cults in Melanesia. In focusing on similarities between cargoism and SETI, I argue that, understood in terms of cultural practice, aspects of the science of SETI have significant similarities to the religious elements that characterize cargoism. Through a focus on the construction of meanings, I consider how SETI and cargoism use similar signification systems to communicate meaning related to local social (...) contexts and I draw a parallel with the religious and meaning structure of cargoism to show that SETI and cargoism employ similar strategies to justify beliefs. As a result, in some ways SETI represents a scientific framework that inhabits cultural and epistemological space that overlaps with religious space. (shrink)

If we eventually discover extraterrestrial life, do we have any moral obligations for how to treat the life-forms we find; does it matter whether they are intelligent, sentient, or just microbial—and does it matter that they are extraterrestrial? -/- In this paper, I examine these questions by looking at two of the basic questions in moral philosophy: What does it take to be a moral object? and What has value of what kind? I will start with the first of (...) these questions by looking at the most important attempts to answer this question on our own planet and by asking whether and how they could be applied to extraterrestrial life. The results range from a very strong protection of all extraterrestrial life and all extraterrestrial environments, whether inhabited or not, to total exclusion of extraterrestrial life. Subsequently, I also examine whether extraterrestrial life that lacks moral status can have value to human or alien life with moral status, and if that could generate any obligations for how to treat extraterrestrial life. Based on this analysis, I conclude that extraterrestrial life-forms can have both instrumental value and end value to moral objects, which has strong implications for how to treat them. (shrink)

Communication with other life forms in our universe has been an ongoing effort most notably conducted by the Search for Extraterrestrial Intelligence Project (SETI). Whereas SETI uses a network of radio telescopes to search for frequencies that may indicate intelligent design, there are also attempts to communicate with extraterrestrials by using different ways to listen for messages as well as send messages. This article outlines a phenomenological approach that includes changes in cognition due to the creation of electronic (...) sounds mixed with stellar acoustics, radio frequencies, and natural and manmade sounds as a way of experiencing changes in cognitive states. These cognitive states may be related to a conscious contact with other life forms not from our world. In this sense it is a galactic approach to interspecies communication. (shrink)

From antiquity to the present, humans have debated whether intelligent life exists elsewhere in the universe. This presentation will survey this debate, examining the roles played in it by science, religion, philosophy, and other areas of human learning. One thesis that will be developed is that whether or not extraterrestrials exist, ideas about them have strongly influenced Western thought.

Developments that suggest the universe is full of life make the Fermi paradox increasingly pressing, but our search for an extraterrestrial technological civilization (“ETC”) is handicapped by our ignorance of its probable nature and behavior. This paper offers a way around this problem by drawing on information theoretical concepts, including game theory and Bayesian probability. It argues that, whatever its ultimate goals, an ETC would have the same instrumental goals as other intelligent agents. Generically, these are self-preservation and the (...) acquisition of resources. For an advanced ETC, these generic goals imply the objectives of removing existential threats and acquiring strategic and non-strategic information. Since the most problematic existential threats for any ETC would be from other civilizations and planets hosting such civilizations would also be copious sources of information, these objectives would lead it to gather information from these locations and to protect itself against them. This dual-goals hypothesis resolves the Fermi paradox, redirects the search for extraterrestrial intelligence and makes testable predictions regarding ETC’s behavior on Earth if it is here. (shrink)

This paper will attempt an investigation of hypothetical intelligent extraterrestrial life from the perspective of the philosophy and theology of St. Thomas Aquinas. Section I will feature an overview of St. Thomas's relevant philosophy of human nature and the differences between human and extraterrestrial natures. Section II will, with special attention to St. Thomas's De malo, treat some possibilities regarding the need for salvation in our hypothetical species. Section III will outline relevant aspects of Thomistic soteriology, especially the reasons (...) behind the Incarnation and the role of human nature in Redemption. Section IV will feature a critique of representatives from the two major schools of scholarly thought on this issue, showing that they either disregard the necessity of a human nature for incorporation into the Mystical Body of Christ or deny the magnitude and singular importance of the Incarnation. Section V will sketch some possibilities for the soteriology of extraterrestrial life using the theology of St. Thomas Aquinas as a framework. (shrink)

Present-day speculation on extraterrestrial intelligence, taking its cue from a number of programmes currently "listening" for electro-magnetic signals from space, have a prehistory dating back to the immediate aftermath of the Copernican Revolution. Throughout the centuries of the Early Modern Period, it was not only theological but also more or less secular philosophical concerns that informed the hopes and the fears that writers of all stripes associated with the tentative notion that "We are not alone." It was not until the (...) "Romantic" period, around 1800, that a reaction set in: as Goethe put it, there is also a universe within us-one worthier of our attention than the cosmos. (shrink)

In the movie Contact, an astronomer played by Jodie Foster discovers a radio signal with a discernable pattern, a sequence representing prime numbers from 2 to 101. Because the pattern is too specifically arranged to be mere random space noise, the scientists infer from this data that an extraterrestrial intelligence has transmitted this signal on purpose.

The possibility of extraterrestrial intelligence (ETI) exists despite no observed evidence, and the risks and benefits of actively searching for ETI (Active SETI) have been debated. Active SETI has been criticized for potentially exposing humanity to existential risk, and a recent game-theoretical model highlights the Hobbesian trap that could occur following contact if mutual distrust leads to mutual destruction. We argue that observing a nearby ETI would suggest the existence of many unobserved ETI. This would expand the game and implies (...) that there may be a mechanism that prevents ETI from attacking us. As a result, the Hobbesian trap would be avoided if both parties assumed the other is not likely to attack. (shrink)

The problem of finding and studying extraterrestrial civilizations is a problem of exceptional importance to human experience, culture, and philosophy. For the information obtained as a result of the discovery of intelligence in the cosmos may point the path to development of our civilizations over astronomically long periods of time. Utilization of such information could fundamentally change our entire way of life and functioning. Interest in the solution of this superproblem grows with each passing year and involves a constantly increasing (...) number of the most competent experts working in various spheres of natural science. (shrink)

New theological understanding can emerge with the advancement of scientific knowledge and the use of new concepts, or older concepts in new ways. Here, the authors present a proposal to extend the concept of “rescue and recovery” found in the United Nations Law of the High Seas, off‐world and within a broader purview of other intelligent and self‐aware species that humans may someday encounter. The notion of a morality that extends to off‐world species is not new, but in this (...) analysis, rescue and recovery become an imperative when any intelligent and self‐aware species is in harm's way. Rescue and recovery encompass a necessary action component except perhaps in those cases where rescuers are in danger. The authors explore three biblical examples of rescue and recovery to derive a fundamental meaning of the concept. (shrink)

The search for extra-terrestrial intelligence (SETI) raises a number of scientific/philosophical questions. If we are the only conscious, intelligent species in the galaxy, why? If we are not, given that other cultures must be more technically advanced than us, why haven't we met them yet?

That life probably exists on other bodies in the universe is now a commonplace. That intelligent life exists elsewhere in the universe--taking for granted its presence on earth--is a widespread hope. Scientific efforts are under way, including space probes, special observations, and broadcast programs, in the systematic search for extraterrestrial intelligence. The question naturally arises whether other human beings are somewhere out there. Fresh avenues of philosophic reflection are opening concerning ethics, theology, and the metaphysics of being human. Imagination (...) has been abundantly working over such issues extraterrestrially. Science fiction has run worlds away from science fact. Surrounded by yearning, fantasy, and popular culture, we need to clarify the intellectual grounds for work on extraterrestriality. The topic of other worlds and other intelligent life is an ancient and recurrent theme in great world cultures, including the Western tradition. (shrink)

Throughout his writings, Karl Rahner remained open to the prospect that the process of cosmic evolution had yielded sentient life form in other galaxies. He argued against any theological veto on this notion, while also distinguishing the existential significance of such life forms from that of angles. Furthermore, the possibility of multiple incarnations is raised though not affirmed. With its Christological intensity, his theology seems to militate against any repetition of the incarnation. This essay examines some of the arguments for (...) and against the possibility of multiple incarnations, before assessing the current state of the extraterrestrial intelligence debate. In the light of inconclusive scientific findings, the cautionary position of Rahner is reaffirmed. (edited). (shrink)

As Roger Hennessey reminds us, “One of the most famous openings in English literature informs readers that ‘in the last years of the nineteenth century … human affairs were being watched keenly and closely by intelligences greater than man's yet as mortal as his own’” . So began H. G. Wells's famous War of the Worlds , in which Martians invade the Earth.The general public seems scarcely aware that discussions of extraterrestrial intelligent beings began to appear centuries before 1897, (...) not just in fiction but also in serious writings by leading scientists, philosophers, and religious authors. Well before 1970 such scholars as Pierre Duhem, Arthur Lovejoy, and Marjorie Hope Nicolson had shown that mainline intellectuals for centuries have been writing about extraterrestrials. Between 1982 and 1996, three scholars published detailed and fully referenced books documenting in detail the history of ideas of extraterrestrial life from antiquity to the late twentieth century . In the last few years at least a half‐dozen authors have sought to repackage this exciting message for the literate public. The most successful of these popularizations is Worlds without End: The Historic Search for Extraterrestrial Life, the most recent book by Roger Hennessey, a retired British schoolteacher and administrator with strong interests in the history of science and technology.The strengths of Hennessey's volume are numerous. He has read and understood both the most authoritative scholarly work in this area and also a significant portion of the vast primary literature. He has surveyed in an engaging, judicious, and balanced manner materials from antiquity to the present and embellished his narrative with seventy‐two well‐chosen illustrations. He has avoided sensationalism even when writing about sensational controversies and eschewed partisanship even while describing individuals who in many cases were nothing if not passionate in their convictions. He has shown sensitivity to the complexities and to the range of issues that arose in the history of this long and continuing debate, which, although focused on distant locales and on possibly nonexistent beings, is capable of revealing much about the nature of terrestrials. He has traced through more than twenty centuries a debate that involved not just scientific but also key religious and philosophical issues, presenting the debate in its full cultural richness. The level of informational accuracy in his book is high . Although his references are significantly fewer in number and less specific than many scholars might prefer, they are at least adequate to assure specialists that he is not presenting as his own the hard‐won research results of others. The overall format of the book is appealing, its bibliography adequate, its index better than one expects in popularizations.Historians of science wishing to enhance a survey course in the history of science with an attractive text that will reveal to students a history filled with striking controversies and colorful figures as well as little‐known facets of the thought of many scientists of distinction may wish to consider using this book. (shrink)

While the scientific discourse on astrobiology—the study of the origin, evolution, and distribution of life in the universe—leans toward optimism about the possibility of extraterrestrial life, optimistic thinking is tempered by the limits of evidence and observations gathered thus far. Most astrobiologists assume that “first contact” with extraterrestrial life, if it is ever to occur, will likely be the discovery of microbial life elsewhere in our solar system. But in popular culture, “first contact” tends to be characterized as contact with (...) extraterrestrial intelligence. This article will touch on theory and research relating to the origins and evolution of life and intelligence on Earth and speculation about extraterrestrial life and intelligence. (shrink)

Intelligent design is the science that studies how to detect intelligence. Recall astronomer Carl Sagan’s novel Contact about the search for extraterrestrial intelligence (or SETI). Sagan based the SETI researchers’ methods of design detection on scientific practice. Real-life SETI researchers have thus far failed to detect designed signals from distant space. But if they encountered such a signal, as the astronomers in Sagan’s novel did, they too would infer design. Intelligent design research currently focuses on developing reliable methods (...) of design detection and then applying these methods, especially to biological systems. (shrink)

This study, conducted by the Dr. Edgar Mitchell Foundation for Research into Extraterrestrial and Extraordinary Experiences (FREE), represents the first comprehensive investigation on individuals (N = 3,256) who have reported to have had various forms of contact experience (CE) with a non-human intelligent being (NHI) associated with or without an unidentified aerial phenomenon (UAP). Our research methodology utilized two comprehensive quantitative surveys totaling 554 questions administered in subjects with reported non-hypnotic memory recall of their CE. This survey addressed a (...) diverse range of physical, psychological, perceptual, and paranormal aspects of reported non-hypnotic based recall of both physical and/or non-physical interactions with a NHI being. The results revealed complex reported CEs that involve both physical and non-physical (psychological outcomes, non-ordinary states of consciousness, and paranormal experiences) events. What may be the most significant aspect of the interim results is that approximately 70% (N=2,279) of the study population claimed that their CE changed their life in a “positive way.” In contrast, only 15-20% reported a “negative” impact from their CE. Further, the majority of subjects did not report events typically associated with the traditional held beliefs regarding the “alien-abduction” phenomena. That is, the results suggest that the reported CE with NHI is largely non-physical and can occur via telepathy, during an out-of body experience, being floated into a "matrix-like" reality, as well as through physical interaction on board a craft. Consequently, the results suggest that a non-physical (“contactee”) CE is distinctly different than the physical (“abduction”) CE and should be studied as separate but interrelated anomalous events. In fact, the CE associated with a UAP is not the predominant form of CE and that sighting a UAP is not necessarily associated with a CE. Consequently, future studies should not focus exclusively on the analysis of UAP sightings and traces alone which, based on decades of research, have not advanced our understanding of the possible force which governs and regulates this complex phenomenon. This is an important consideration since the FREE study dispels the notion that contact with NHI beings must always entail either a physical abduction or a landed craft with beings interacting with humans. This study may serve as a needed foundation for researchers to build upon for validation purposes to better understand a unique and diverse range of reported physical and non-physical type CEs with a NHI associated with or without a UAP. (shrink)