Conservative think tanks, like the American Enterprise Institute, the Heritage Foundation, and the Cato Institute, have had enormous success in shaping political ideas and policy over the last forty years. But historian Jason Stahl argues that some of their greatest achievements have been in remaking the terrain on which historically liberal think tanks have operated on. He reflects on the ways that the Democratic Party moved to the right in the 1990s, influenced by the Democratic Leadership Council’s think tank, the Progressive Policy Institute. Stahl also discusses the power of ideas amongst white supremacists, as illustrated by the appeal of Richard Spencer, of the far right National Policy Institute think tank.