Really, Made By Wall Street. According to Antony Sutton in Wall Street and the Rise of Hitler, without Wall Street, there would have been no Hitler, Nazi's or World War 2, or Bolshevik Revolution.
https://archive.org/details/WallStreetAndTheRiseOfHitlerByAntonySutton
And behind Wall Street he said, was the Skull & Bones secret society. Too many focus on symptoms, instead of the causes of problems.