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David Graeber birthday
(szmer.info)
David Rolfe Graeber (/ˈɡreɪbər/; February 12, 1961 – September 2, 2020) was an American anthropologist and anarchist activist. His influential work in economic anthropology, particularly his books Debt: The First 5,000 Years (2011), Bullshit Jobs (2018), and The Dawn of Everything (2021), and his leading role in the Occupy movement, earned him recognition as one of the foremost anthropologists and left-wing thinkers of his time.
People can be motivated to pitch in because they rely on everyone else to pitch in. For some, that's growing food, and for others, its keeping the plumbing running.
I refer you back to the previous comment
You can believe what you want about altruism. Mutual aid is not necessarily altruism.
It is when one job involves life risking work and the other does not.