Prior to Elliot Rodger's attack on Isla Vista last Friday, Rodger emailed a 137-page manifesto to several people detailing his plan, calling it, "The Day of Retribution" and "My War on Women."

What also emerged was his involvement in the culture of pick-up artists. He subscribed to several YouTube channels made by members in that community and that dialogue may have influenced him. 

Joining us is Amanda Marcotte, writer for the American Prospect. She's also the author of, "It's A Jungle Out There: The Feminist Survival Guide to Politically Inhospitable Environments."