Tribal Fear On The Road To The White House

On the whole, fear is a good thing - it's what helps us stay alive in dangerous situations. But it's also used to manipulate how we think, how we feel - and how we vote.
Arash Javanbakht is an associate professor at Wayne University, and he is an expert in fear, trauma and PTSD. He explained the nuts and bolts of fear to me, how it works in the tribal context and what that means for the upcoming American presidential election.