Instead of thinking always like these demon, that "I have got so much money. Now I shall get further amount of money and it will be like so much money. He is my enemy. I have killed one of them" This is going on actually, in the material field: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.