The world in which we live in has an increasing number of feedback loops (recursiveness) causing events to be the cause of more events, thus generating snowballs and arbitrary and unpredictable planet-wide winner-takes-all effects. We live in an environment where information flows too rapidly, accelerating such epidemics. Likewise, events can happen because they are not supposed to happen. This type of randomness did not prevail during the Pleistocene, as socioeconomic life was far simpler then.

Related: Evolution of Society Post-Pleistocene