In this article we try to give a philosophically reflected introductory overview of the current theoretical developments in the field of evolutionary aesthetics. Our aim is not completeness. Rather, we try to depict some of the central assumptions and explanatory tools frequently used in evolutionary accounts of human aesthetical preferences and address a number of currently debated, open research questions.

A family reconstitution study of the Krummhörn population (Ostfriesland, Germany, 1720–1874) reveals that infant mortality and children’s probabilities of marrying or emigrating unmarried are affected by the number of living same-sexed sibs in farmers’ families but not in the families of landless laborers. We interpret these results in terms of a “local resource competition” model in which resource-holding families are obliged to manipulate the reproductive future of their offspring. In contrast, families that lack resources have no need to manipulate their (...) offspring and are more likely to benefit from allowing their offspring to capitalize on whatever opportunities to reproduce present themselves. (shrink)

Based on historical data pertaining to the Krummhörn population (eighteenth and nineteenth centuries, Germany), we compared reproductive histories of mothers according to whether the maternal grandmother (MGM) or the paternal grandmother (PGM) or neither of them was resident in the parents’ parish at the time of the mother’s first birth. In contrast to effects of PGMs, we discovered conditional differences in the MGM’s effects between landless people and wealthier, commercial farmers. Our data indicate that the presence of the MGM only (...) lowers the woman’s age at marriage (AAM) and her age at the birth of her first child (AFB) in the case of landless families. However, among commercial farmers, who can generally be characterized by a lower AAM and AFB, we found opposite tendencies for the MGM’s effect leading to a relatively small delay in AAM and AFB. Moreover, we also analyzed differences in the completed fertility (i.e., children ever born: CEB). Results indicate that landless families in general do have fewer CEB compared with commercial farmers except for those families in which the MGM has been present. Emphasizing that the adaptiveness of investment decisions should depend on the interaction of genetic, lineage-specific (intrinsic) and ecologically imposed (extrinsic) constraints, we conclude that kin strategies consequently address different fitness components under different conditions. (shrink)

The wealthy elite males of nineteenth-century Krummhörn (Ostfriesland, Germany) achieved an above-average reproductive success. Membership in the elite class was determined from a list of the 300 richest men in the Ostfriesland district compiled by authorities in 1812. The main components establishing the link between cultural success and reproductive success aredifferences in the number of offspring owing to differences both in time spent in fecund marriage (mating success) and in rate of reproduction;differences in the probabilities of one’s adult offspring marrying (...) locally vs. emigrating unmarried owing to differential ability to allocate resources that enhance the “social placement” of adult offspring; anddifferences in the probability of total reproductive failure (lineage extinction).Contrary to what might be expected, infant survivorship was lowest amongst the richest families. We conclude that to a great extent females’ reproductive decisions contribute to the greater reproductive success of the elite males. (shrink)

Dieser Beitrag widmet sich der Darstellung des systematischen Zusammenhangs des mit dem Aufkommen der Experimentellen Philosophie neu entstandenen Teilbereichs der Experimentellen Ethik mit der spätestens seit den 1980er Jahren wieder populär gewordenen Evolutionären Ethik, einer Teildisziplin des philosophischen Naturalismus. Nach einer kurzen Charakterisierung beider ethischer Teilbereiche wird am Beispiel der metaethischen Frage nach der Objektivität moralischer Urteile dafür argumentiert, dass die partikulären Ergebnisse experimenteller Methoden in der Moralphilosophie erst in einer umfassenderen Perspektive auf menschliches Handeln vollständig interpretierbar werden: Ohne eine (...) rahmenbildende Hintergrundtheorie moralischen Urteilens, wie z.B. die Evolutionäre Ethik, liefert die Experimentelle Ethik nicht mehr als proximate Erklärungen moralischer Urteilsmechanismen. Zweifelsohne sind dies wertvolle Erkenntnisse über die Funktionsweise moralischer Urteilsfindung – ohne Ordnungsrahmen drohen sie jedoch unverbunden nebeneinander stehen zu bleiben. Andererseits beinhaltet gerade die Evolutionäre Ethik empirische Hintergrundannahmen über menschliches moralisches Urteilen, die erst mit den Methoden der Experimentellen Ethik ihre unabdingbare empirische Überprüfung finden können. Diese zwei Teilbereiche der Moralphilosophie stehen daher in enger systematischer Beziehung. (shrink)

Self-deception may be the result of social manipulation and conflict management of social in-groups. Although self-deception certainly has offensive and defensive aspects, a full evolutionary understanding of this phenomenon is not possible until strategies of other parties are included into a model of self-perception and self-representation.

Life history theory predicts that exposure to high mortality in early childhood leads to faster and riskier reproductive strategies. Individuals who grew up in a high mortality regime will not overly wait until they find a suitable partner and form a stable union because premature death would prevent them from reproducing. Cox proportional hazard models were used to determine whether women who experienced sibling death during early childhood (0–5 years) reproduced earlier and were at an increased risk of giving birth (...) to an illegitimate child, with illegitimacy serving as a proxy for risky sexual behavior. Furthermore, we investigate whether giving birth out of wedlock is influenced by individual mortality experience or by more promiscuous sexual behavior that is clustered in certain families. Models are fitted on pedigree data from the eighteenth- and nineteenth-century Krummhörn population in Germany. The results show a relationship between sibling death in early childhood and the risk of reproducing out of wedlock, and reproductive timing. The risk of giving birth out of wedlock is linked to individual mortality experience rather than to family-level effects. In contrast, adjustments in connubial reproductive timing are influenced more by family-level effects than by individual mortality experience. (shrink)

Commentary on J. Gowdy & L. Krall "The economic origins of ultrasociality": We question the sequence of evolutionary transitions leading to ultrasociality in humans proposed by Gowdy & Krall. Evidence indicates that families are, and likely always have been, the primary productive units in human agricultural economies, suggesting that genetic relatedness is key to understanding when the suppression of individual autonomy to the benefit of subsistence groups, i.e. extended families, evolved.

In Einklang und in Verlängerung der „Social Brain Hypothesis” wird hier das Argument entfaltet, dass die Freiheitsintuition evolutionär im Zuge der sozialen Evolution der Primaten entstanden ist. Der Hauptselektionsdruck lastete auf der Fähigkeit, soziales Wissen über andere zu generieren, um Sozialpartner in ihren Verhaltenstendenzen berechenbar zu machen und die eigene Verhaltensproduktion strategisch vorteilhaft darauf einstellen zu können. In der sozialen Evolution der Primaten wurde deshalb ein Fremdverstehen prämiert und nicht etwa eine zunehmende Fähigkeit zur Selbsterkenntnis. Die Intuition des freien Willens (...) kann deshalb besser als biologisch funktionale soziale Attribution denn als introspektiv gewonnene Einsicht verstanden werden. (shrink)