"Lies are more engaging online than truth," says former CIA analyst, diplomat and Facebook employee Yaël Eisenstat. "As long as [social media] algorithms' goals are to keep us engaged, they will feed us the poison that plays to our worst instincts and human weaknesses." In this bold talk, Eisenstat explores how social media companies like Facebook incentivize inflammatory content, contributing to a culture of political polarization and mistrust -- and calls on governments to hold these platforms accountable in order to protect civil discourse and democracy.