On the occasion of the 150th anniversary of the beginning of the American Civil War, Historical Materialism has brought together some of the most significant Marxist scholars working in this area to debate the issues. This text introduces some of the questions raised by the Civil War and Southern slavery for Marxists and introduces the essays that follow.

Karl Marx and Abraham Lincoln held very different views on the ‘social question’. This essay explores the way in which they converged in their estimation of slavery during the course of the Civil War; Marx was an ardent abolitionist, and Lincoln came to see this position as necessary. It is argued that the rôle of runaway slaves – called ‘contraband’ – and German-revolutionary ’48ers played a significant rôle in the radicalisation of Lincoln and the direction of the War.