How it becomes toxic most of the time? Sociopaths will always have an edge to be on top of self centric pyramidal organisations. And those who starts nice people tend to get corrupted by the system which favor attempts to breed, threat and decive the small surface area in the center of the concentric power construction. Exceptional beings can certainly be pointed to show this is not the absolute fatality. Probably far rarer than sociopaths ready to harass them though.