Earlier quoted context omitted.
The collective belief that you own your home is a crucial part of its value. If you come home and find a bunch of people partying in your kitchen, you can tell them to leave, or call the police and they'll drag them out. That's all due to the collective belief that you own your house. Without that collective belief, owning anything is a huge effort to defend it against whoever else it might appeal to.
This "collective belief" is somewhat more than mere "belief". It has been translated into laws and social contracts backed by established enforcement that is sufficiently effective and has been demonstrated to the satisfaction and judgment of most people. It's true that in the event of nuclear war, this could all evaporate --- but this probabilty is low enough for most people to reasonably ignore. Labeling this a "be…
If you find yourself believing that our own social contract is the only logical & rational one, or at least the likely result of social progress, you might try reading Graeber and Wengrow's The Dawn of Everything. It covers a very wide range of alternatives that all made sense to the people in those societies at the time.