Society

 Societies are social by their very nature and working for the common good is socialist.

There are periods where the majority of a population is oppressed by a minority who is normally better armed and aided by internal belief that says they have a "divine" right to rule and an external threat that justifies the need for them to protect us.

Its a model that worked in many places and is the definition of trickle down. 

Of course trickle down is deceptive since what is trickling down are things created by your hard work.

The need to create a society where everybody is equal and able to keep more of what they create is evident.

The goal of a society should be the betterment of its members.  All of its members.