Not just thinking but also doing things that they dont like or disagree with. You have to trust that the other guy will also do the right thing and not screw you over for his own profit. I feel like you oversimplify the issue, by a lot. In a world of kind and selfless people one smart and greedy bastard is all it takes to send the entire thing collapsing. I am looking back at history and I dont think any society that promoted altruism ever succeeded in any actually meaningful capacity (aka wasnt wiped out or changed drastically anyway down the line). Society and world view can and is changing over time, but just as it changes for the good it can easily be sent tumbling down back and regress back, and we see that a lot constantly; it takes a lot of time and effort to just keep standing where we are now, let alone climb higher. Should we stop trying? No. But claiming that it "just" and the fundamental problem with human world view is "simple" feels like either blind optimism or blissful ignorance.
Trying to build something akin to what Sabrina builds is basically constructing a house of cards; its just Sabrina cheats with glue.
I dont even think its ever possible to build utopia; you have to basically lobotomize human population to do so because no matter how hard you try until people can think for themselves and come to their own conclusions there are always would be those who consider themselves better than others and hence more deserving of things others have.
...I am not actually sure how appropriate this discussion for this thread. It feels on topic at least for the last chapter but, well, its ultimately up to mods.
