The new book Oligarchy by Northwestern political economy professor Jeffrey Winters explores how society’s rich, from ancient Rome to Indonesia, fought to preserve and increase their wealth. Although many Americans may balk at his terminology, Winters argues that the wealthiest Americans are not only oligarchic, but more powerful than their counterparts from any other period in U.S. history. He and Jerome McDonnell talk about how we got here and to what extent social movements like the “Occupy” protests can stop the concentration of wealth.