All cultures prior to the invention of the modern state. Basically all current "native" cultures, including but in no sense limited to: the Bemba, the Nuer, the Iroquois, Polynesians, Melanesians, etc. etc. etc. Almost all day to day interactions (familial, friendly, etc.).

And that's also honestly not relevant to the discussion at hand. OP stated "the alternative to capitalism is to remove negotiation from individual interactions by implementing more State-heavy mechanisms like Communism" and asked if (s)he was making a straw man. I responded that (s)he was on many levels -- there are plenty of alternatives to Capitalism other than Communism, and Communism is also the opposite of a "state-heavy mechanism" given that it literally has no state.