Assuming that some groups of foragers indeed practiced "primitive communism," they would have died out because they had lost the fierce competition with the more economically viable "libertarian" tribes. Communism has never appeared spontaneously and "naturally" in the history of mankind.
Contrary to popular thinking, we do not need the central bank to stabilize prices in order to promote economic prosperity. The central bank can neither know the "correct" level at which to stabilize prices, nor can it know the right way to do it.
With the economy growing at 2.1%, unemployment at 3.6%, creating 170,000 jobs per month, and estimated underlying core inflation of 2%, no objective data justifies cutting rates that are already artificially low.