There would be no real incentive to take my potatoes, since you already have your needs being met.

But if you decided you wanted to steal my personal property anyway for giggles, especially under threat of violence, I would likely tell the neighbors or community we both live in what you’re doing, and you may be shunned from the community.

If you attempt to commit violence against me, I could defend myself, and call upon a community defense group to help, similar to how Rojava does it.

I think you’d be surprised how uncommon that sort of behavior would be under what would effectively be a semi-post scarcity society. A person living in anarchist Catalonia during the revolution described how odd it was after they abolished money, and people had the option of simply taking more than they needed. But he described how quickly people adapted to it, and began only taking what they needed, as they became assured they would be able to get more when they needed it, and didn’t want to deprive soneone else.

There’s quite a repository of archeological evidence that the style of society I’m describing was once the norm until fairly recently in human history, showing us that our current mode of existence, where dominance hierarchies and artificial scarcity rule, is not a deeply rooted or unchangeable aspect of human nature, but in fact an aberration from the norm.

You can read more on that aspect in the book The Dawn of Everything, by David Graeber and David Wengrow. Highly recommend it.

Humans are astonishingly cooperative with eachother in a post scarcity environment, but there have been few opportunities in the modern era for that to come out and flourish, as otherwise capitalism wouldn’t be able to perpetuate itself.