Diana Fleischman
Evolutionary psychologist and researcher
Diana Fleischman is an evolutionary psychologist whose work on disgust sensitivity, sex differences and reproductive strategy brings hard biological thinking to questions the gender debate usually handles with cultural gloves. On Beyond Gender she went where most commentators won't, and did it with both rigour and candour.
Diana Fleischman is an evolutionary psychologist whose research focuses on disgust sensitivity, sex differences and the evolved pressures that shape human psychology and moral emotion. Her work applies evolutionary theory to questions that are typically treated as purely social or political — including sexual attraction, gender identity and the feelings of revulsion that organise so much of social life. She has written and spoken widely on these themes, consistently willing to follow the evidence rather than the consensus.
She appeared on Beyond Gender in the episode Disgust, Dating, and Autogynephilia: An Evolutionary Psychologist's Taboo Takes (5 June 2025), joining hosts Stella O'Malley, Mia Hughes and Bret Alderman for a conversation that took the gender debate into territory most commentators actively avoid. Fleischman drew on her research into disgust sensitivity to examine public reactions that are routinely written off as irrational or simply bigoted, arguing that those reactions have coherent biological underpinnings that deserve understanding rather than dismissal.
A centrepiece of the conversation was autogynephilia — the pattern of sexual arousal in some males at the thought of themselves as female — which Fleischman approached as a psychological phenomenon with evolutionary roots rather than as a political talking point. She traced what that framing means for how we understand gender dysphoria, identity and attraction, holding the complexity steadily throughout.
What distinguishes her as a Beyond Gender guest is precisely the combination of scientific precision and intellectual honesty the hosts prize: the capacity to go into genuinely taboo territory and come out with something illuminating rather than inflammatory. The episode stands as one of the clearest examples of what evolutionary psychology can contribute to this debate when it is done without flinching.
