This entire article tries to make a point that it's not just "great men" or "structural forces" alone being responsible for the course of history, but then completely misses the point again by labeling someone in power as mediocre and arguing that that mediocrity caused much of the events of the 20th century.

This once again causes oversimplifies history to a few people and some nebulous "structural forces", and provides an attractive but wrong model of how history developed. In software terms we would call this a "leaky abstraction", and this particular abstraction leaks so much it's barely useful at all.

The world is much too complex to be understood by examining less than at least a few hundred million people. That this is beyond the capability of humans is not the world's problem.