Even the freest possible human community is very close to communism in absolute terms.

Of course. We are a community species. Humans are at their best when they cooperate and work together for a common cause that is why team sports are such an obsession in society. They represent our evolutionary history and that is also why these words, 'community, common, commune and communism' are synonymous. True communism is a socio-economic system based on the human community ideology that promotes working together for the common good. The opposite is to promote division and conflict within a populous. Red and Blue. Fox and CNN. Black and White, GOP and Dem etc etc etc.