Several recent publications attest to a renewed interest, at the dawn of the 21st century, in the philosophy of Charles S. Peirce. While agreeing with the relevance of Peirce philosophy for the 21st century, we disagree with some interpretations of Peirce as a utilitarian-based pragmatist, or with attempts to extract from Peirce a theory of social justice for 21st century societies. A critical exploration of Peirce’s philosophy of science, particularly his idea of scientific inquiry as “the study of useless things”, (...) serves to illuminate the un-pragmatic and anti-utilitarian dimension of Peirce’s thought, as well as to reveal his true ethical relevance for the 21st century. (shrink)