Robin Blackburn's insightful book, 'An Unfinished Revolution: Karl Marx and Abraham Lincoln,' offers a compelling re-examination of 19th-century political thought and action. It masterfully explores the often-overlooked connections and surprising parallels between two titanic figures: the revolutionary theorist Karl Marx and the American President Abraham Lincoln. Blackburn argues that while their methods and immediate goals differed, both grappled with profound questions of class, capitalism, and human emancipation during a period of intense global upheaval, particularly concerning the American Civil War and the abolition of slavery. This work challenges conventional historical narratives, inviting readers to consider how Marxist analysis intersected with Lincoln's struggle to forge a new nation free from the shackles of chattel slavery, highlighting both achieved and unfulfilled revolutionary potential.