Karl Marx's 200th birthday is coming up on 5 May 2018. Which means that it is high time to look at the most important facts surrounding the life and achievements of the great economist and social theorist once again and make sure that you are ready with a couple of anecdotes whenever small-talk pops up during Karl Marx year. You can test how much you already know about Karl Marx now by answering the following 15 quiz questions. It starts right here. Good luck!