This book provides a framework for understanding and analyzing Bernie Sanders's democratic socialism, its origins, its maturation, and its evolution between 1972, when Sanders ran for the Vermont gubernatorial election for the first time, and 2020, when he made his second presidential run. The core argument is that Bernie Sanders's characteristic brand of socialism evolved from the mold of late 19th century utopian radicalism to radical demands for state and corporate accountability in the 21st century, turning into a social movement for reparative justice that rose to national prominence in the wake of the Great Recession in 2008 and of the Occupy Wall Street movement in 2011.