Social psychologist Dannagal Young breaks down the link between our psychology and politics, showing how personality types largely fall into people who prioritize openness and flexibility (liberals) and those who prefer order and certainty (conservatives). Hear why both sets of traits are crucial to any society — and how our differences are being dangerously exploited to divide us. What if things weren’t that way?

What can you do to build a better world? Sharing stories from her pioneering career dedicated to tackling poverty, Jacqueline Novogratz offers three principles to spark and sustain a moral revolution. Learn how you can commit (or recommit) to creating big, positive change in your lifetime — and give back more to the world than you take from it. “It is in the darkest times that we have the chance to find our deepest beauty,” Novogratz says.

“Lies are more engaging online than truth,” says former CIA analyst and diplomat 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.