Abstract

We explain how the work of Charles Sanders Peirce (1839–1914) – the founder of semiotics and of the pragmatist tradition in philosophy – contributes an epistemological, metaphysical, and ethical foundation to some key transhumanist ideas, including the following claims: technological cognitive enhancement is not only possible but a present reality; pursuing more sweeping cognitive enhancements is epistemically rational; and current humans should try to evolve themselves into posthumans. On Peirce’s view, the fundamental aim of inquiry is truth, understood in terms of a stage of ideal cognition (what he calls the “final opinion”). As current human cognitive abilities are insufficient to achieve this stage, Peirce’s views on cognition support a variety of ways in which they might be enhanced. Finally, we argue that what Peirce describes as our ethical summum bonum seems remarkably similar to what Bostrom (2005) argues to be the core transhumanist value: “the exploration of the posthuman realm.”