Contributor(s): Dr Tristram Hunt | With capitalism in crisis, the shadow of Karl Marx is looming large. But what about the co-author of The Communist Manifesto? In advance of a major new biography, The Frock-Coated Communist, Tristram Hunt explores the life and work, the personal contradictions and ideological breakthroughs, of Friedrich Engels. Cotton-lord and communist, Engels was the man who turned Marxism into a political force - and whose vision was then brutally betrayed in the 20th century. Tristram Hunt is an historian, broadcaster and a lecturer in British history at Queen Mary, University of London.