Historian Lily Geismer’s new book Left Behind: The Democrats’ Failed Attempt to Solve Inequality is a comprehensive and critical look at the development of the Democratic Party, from the Watergate Babies to the neoliberal turn under Bill Clinton and beyond. In Geismer’s account, the Democratic Party has not simply been playing defense for half a century; instead, Democrats actively undermined New Deal–era social programs as they sought to marketize public goods for maximum efficiency.