William Costello
Evolutionary psychologist and PhD researcher in David Buss’s Evolutionary Psychology Lab at the University of Texas at Austin, known for research on incels, mating psychology, singlehood, and evolutionary perspectives on sex differences.
Cross-Sex Friendships Often Blur Platonic and Romantic Intent
William Costello argues that cross-sex friendship is not best understood as a fragile exception to romantic interest, but as one common route into relationships and a way for men and women to understand each other better. In a discussion with Chris Williamson, Freya India, and Tania Reynolds, he says romantic and sexual interest inside opposite-sex friendships is common, often misread, and not necessarily evidence that the friendship is fake. The group’s central tension is that the same ambiguity that can turn friendship into partnership can also produce wishful thinking, jealousy, backup-mate dynamics, and confusion over what counts as truly platonic.
Modern Dating Has Turned Sex Differences Into Moral Conflict
Chris Williamson’s debate with Freya India, William Costello and Tania Reynolds uses polling on young women’s negative views of men as the starting point for an evolutionary-psychology account of modern dating. The panel argues that older sex differences have not disappeared but have been pushed into online politics, group chats, beauty markets and relationship norms, where mate choice, vulnerability, in-group loyalty and public moral signaling make relations between young men and women more adversarial.
Status Anxiety Is Turning Female Privilege Into Public Grievance
Chris Williamson, Tania Reynolds, William Costello and Freya India argue that some young women’s pessimism is partly a status phenomenon: material advantage can coexist with incentives to present as injured, caring or constrained. In their account, gendered expectations make women easier to read as victims than agents, while beauty, higher-education status games and social media turn grievance, attractiveness and relationships into public signals.