Sarah Jaffe has written Necessary Trouble: Americans in Revolt (Nation Books, 2016). Jaffe is a Nation Institute fellow and an independent journalist. Over the last few years, several authors on the podcast have discussed the growth of the Tea Party, BlackLivesMatter, and Occupy Wall Street. Jaffe’s new book returns to the heart of these movements, explaining what has made ordinary Americans become activists. Jaffe argues that the financial crisis in 2008 sparked activism in many forms. In order to make this case, Jaffe travelled the country, interviewing people about what made them angry. She attended a people’s assembly in a church gymnasium in Ferguson, Missouri; walked a picket line at an Atlanta Burger King; rode a bus from New York to Ohio with student organizers; and went door-to-door in Queens days after Hurricane Sandy. Find her on twitter @sarahljaffe.