125

The magical number that constitutes five cubed. Also the magical number that a near-consensus of anthropological social psychologists have determined to be the ideal community size. (For humans.)

 If census takers were around before the European invasion of the continents we call North and South Americas, I am willing to wager that this number (125) would coincide with a large proportion of the nomadic "tribes" moving around the continents in search of safety, food and other natural resources. I also think that this size community would also fit perfectly into Vinoba Bhave's idealized "anarchist" vision of a landscape of loosely interdependent networks of small, self-sufficient communities. (Vinoba's spirit-based concept of "no government" anarchism was totally based in nonviolence, cooperation, mutual aid, and decision-making by consensus as opposed to rule by majority faction or auto- or pluto-cracy.) It is my understanding that community decisions were made by communities, not leaders or "chiefs" or even committees--and that all members of a community were given a voice in any/every decision-making process that affected the whole community. (Even children? Of this I am not sure--though I have heard/read testimony professing that even children were given speaking time in large "council" gatherings if they wanted it badly enough. Perhaps it would be fair to say that these occasions were rather rare due to the fact that children usually had learned respect of the elders and did not always understand the process of much less the long-term consequences of such decisions.) It is well documented (and accepted/aknowledged) that the "Founding Fathers" of the American experiment in independence from British rule used Haudenosaunee examples for the inspiration and creation of that which they called "democracy." 

For aboriginal "Americans" living in groups such as families, war and trading parties, or nomadic or migrational communities, towns, or "tribes," it is believed that consensus was the most desirable and sought after decision-making outcome. Social psychologists will also concede that concepts like consensus are easier to realize (or achieve/manifest) when taken on within smaller groups (like 125).