At the advent of agriculture and the transition away from pastoralism and nomadism, I wish that all tribes had enforced a collectivist mentality regarding possessions instead of allowing chains of inequality that have lashed out for millennia.
I think inequality is one of those things that is really difficult to erase once it has already been normalized. It allows for accumulation of power, and then uses that power to fight against the fragmented opposition to itself. I think there would have been so much less suffering if that issue had been nipped in the bud back at the start of "civilization."
I think I hold the same position as Graeber, I was just keeping it simple.
For example that's partially why I said "all" tribes. I agree that it didn't happen linearly, and agriculture wasn't adopted by all groups at the same time. As Marx pointed out late in his life, many tribes had instead adopted a proto-communism that didn't derive from a local implosion of the capitalist order. However the exploitative form of material relations has nonetheless become dominant over the course of millennia. It is obsessed with subjugation and highly normalized. Therefore I think preventing its instances of origination would have led to the development of very different civilizations.