Given that these tendencies are not evenly distributed throughout the population, you can have structures that leverage the large mean to mitigate the worst ten

Given that these tendencies are not evenly distributed throughout the population, you can have structures that leverage the large mean to mitigate the worst tendencies of the extreme tails. Given that the natural state of things is that power begets more power, these are harder to build and maintain, but it can be done. In particular, Democracies and Republics are major historical examples of this.