Karl Marx

"Such was the man of science. But this was not even half the man. Science was for Marx a historically dynamic, revolutionary force. However great the joy with which he welcomed a new discovery in some theoretical science whose practical application perhaps it was as yet quite impossible to envisage, he experienced quite another kind of joy when the discovery involved immediate revolutionary changes in industry and in historical development in general."

- Friedrich Engels, eulogy at Marx's funeral, 17th March, 1883.

Karl Heinrich Marx (5th May, 1818 - 14th March, 1883) was a philosopher, journalist, political economist, historian, sociologist, political theorist and revolutionary, and the founder of Marxism.