Want to stop political violence? Start by addressing hostile sexism.

Cynthia Miller-Idriss, founding director of American University's Polarization and Extremism Research & Innovation Lab (PERIL), argues that gender-based bigotry is a significant predictor of violent extremism that security officials consistently overlook. In her new book "Man Up," Miller-Idriss presents research showing how misogyny frequently appears in the history of violent extremism, noting that over half of mass shooters target partners. Despite clear evidence connecting domestic violence to mass shootings, national security models fail to account for misogyny, with various institutional barriers preventing effective monitoring of gender-based violence as a precursor to extremist acts.