I reckon it would be outbursts of bad, probably manifested as war, which are overcome by good in whatever timescale, only to have recurring bad periods etc. until time runs out. Some leaders are naturally aggressive, greedy and incapable of resisting the temptation to take someone's land, resources, wealth, right to live etc as we see today. Good people can be 99% and the bad 1%, but it only takes one despot from the 1% to screw things up because of the destructive energy at their disposal. They always intend to be the last man standing in a fight.