Contemporary political theory has become alienated from politics. It often neither discusses concrete political events nor touches the world of political action. Stephen Eric Bronner wants to change that, and Ideas in Action takes a bold step in that direction. With elegance and power, Bronner surveys 20th century political traditions. In the process, he places theories and thinkers in their social, historical, and political contexts. His sweeping presentation is organized into four imaginatively articulated phases that signal the direction of political thinking in the twentieth century. Offering distinctive interpretations and criticisms, presenting a new internationalist perspective, Bronner imbues the text with original voices and primary sources from Adorno to Zetkin.