If you came up with one of the most important ideas in history, would you give up the credit? Alfred Russel Wallace developed the Theory of Evolution independently to Darwin, but held off publishing his ideas until the older man published his. Explore the world of one of Science's unsung heroes.
Along with Frederick Engels, Karl Marx electrified 19th Century political and economic thought. The effects of his work are very much still with us today. He was also a family man and a friend to many as his many letters show. Explore his world.