What is the contribution of karl marx in the field of economics?

Question

What is the contribution of karl marx in the field of economics?

Answer 1

At the time Marx was writing, he was observing economies that were more of a "zero sun game" -- that is, for every gain, there must be a corresponding loss (think real estate). Economies no longer look like that. In fact they look more like win-win, than win-lose. Growth does not necessarily come at someone's "expense". Hence much of Marx's theories are not even applicable in this day. He's an interesting historical figure because of the attention he drew (and continues to draw in some left wing circles).