Kathryn Paige Harden (behavioral geneticist)

Human behavior and moral responsibility are deeply influenced by a complex interplay of genetics and environment, challenging the traditional dichotomy of nature versus nurture. Kathryn Paige Harden, a professor of psychology, posits that many behaviors—including addiction, risk-taking, and antisocial tendencies—are "massively polygenic," meaning they are shaped by thousands of tiny genetic variants rather than a single "crime gene." This biological predisposition, often established in utero, complicates the cultural tendency to equate moral failure with character flaws. By distinguishing between accountability and punitive blame, society can move toward more pragmatic, compassionate systems that prioritize public safety without relying on retributive suffering. Ultimately, genetic diversity is essential to human creativity and innovation, suggesting that attempts to "select" for specific traits could inadvertently stifle the very variety that drives human progress and resilience.