Darby Saxbe (on Dad Brain)

Fatherhood isn’t just a social role—it’s a biological transformation that rewires men’s brains and bodies, according to clinical psychologist Darby Saxbe, whose groundbreaking research in *Dad Brain* reveals that men experience measurable hormonal shifts before birth, including plummeting testosterone and rising prolactin, which prime them for bonding and caregiving. Far from being passive helpers, dads undergo neuroplastic changes like gray matter reduction that streamline their brains for parenting efficiency, proving fatherhood is not an afterthought but a core human function. Saxbe dismantles the myth that men are emotionally detached, exposing how cultural stigma—like workplace resistance to paternity leave and the default assumption that mothers are primary caregivers—erases their role, despite evidence that involved fathers reduce maternal stress, strengthen marriages, and boost child resilience. The data is staggering: men with daughters live 1.7 years longer, while mothers lose nearly 95 weeks of lifespan per child due to the physical toll of pregnancy and lactation, revealing a profound asymmetry in the biological cost of parenting. Yet Saxbe insists this isn’t about blame—it’s about recognition: when society values care as a shared, public good, not a gendered chore, families thrive and communities become more resilient.