How does bullying take root? Social psychologist Amy Cuddy got an inside view of this question after she became the target of a coordinated campaign to discredit her. Drawing on her own experience and years of research, she gives a clear-eyed analysis of how bullying reshaped our culture and how each of us can practice social bravery — everyday acts of standing up for one another — to end it. (Note: This talk contains discussion of suicide.)