Consideration is indeed a factor in cultural evolution. We are a social species. We talk passionately about our intelligence, but our accomplishments are as firmly grounded in our propensity for cooperative behavior. Those cultures that thrive and survive are those that are most effective at ensuring the cooperative interaction of their members. Force and bullying have been used to accomplish that, but not with the same level of efficiency as more positive methods - bullied people just don't work as hard as those who feel their efforts are getting them something. Cash is always good, but respect and status seem to be equally effective.

"Robbins’s claim fails because the Hobbs Act does not apply when the National Government is the intended beneficiary of the allegedly extortionate acts."