The term "resentment" has dominated US news analysis since November 2016. Despite its increased use, this word seems to defy easy categorization. Does "resentment" describe many interlocking sentiments, or is it just another way of saying "anger"? Does it suggest an irrational grievance, as opposed to a legitimate callout of injustice? Does it imply political leanings, or is it nonpartisan by nature? In The Return of Resentment, Robert A. Schneider explores these questions and more, moving from eighteenth-century Britain to the aftermath of the French Revolution to social movements throughout the twentieth century. Schneider illustrates how resentment has morphed across time, coming to express a collective sentiment felt by people and movements across the political spectrum. In this history, we discover resentment's modernity and its ambiguity-how it can be used to dismiss legitimate critique and explain away violence, but also convey a moral stance that demands recognition. Schneider anatomizes the many ways resentment has been used to label present-day movements, from followers of Trump and supporters of Brexit to radical Islamicists and proponents of identity politics. Addressing our contemporary political situation in a novel way, The Return of Resentment challenges us to think critically about the roles different emotions play in politics.