Although there is a long history of conservative movements in America, the library of social movement studies leans heavily to the left. The Tea Party movement, its sudden emergence and its uncertain fate, provides a challenge to mainstream American politics. It also challenges scholars of social movements to reconcile this new movement with existing knowledge about social movements in America. Understanding the Tea Party Movement addresses these challenges by explaining why and how the movement emerged when it did, how it relates to earlier eruptions of conservative populism, and by raising critical questions about the movement's ultimate fate.