So its human nature how we are living now? i dont see any relevance to the topic, if we dont have to fight to survive, we wont fight. IMO the way we are living now is completely unnatural and goes against human nature...
Also i think the barter and trade system suits humanity the best, but our systems arent designed for it so it simply fails.
That would solve the problem of why people work, we would be responsible for our own livelihoods, not on someone handing us some paper to do mundane chores and mindless bs. some central trading areas would be ok, but cities in their current form are horrible for humanites future IMO , we are too concentrated.
Another issue would be crimes of passion , but im sure the jealousy we experience when our potential mate is with another competitor stems from fear of providing for anothers child, in this thoretical utopia birth could easily be controlled, i dont see how unwanted pregancy is still so rampant nowdays, i thought everyone agreed oral sex is 100x better than normal sex anyways
for utopia to thrive we would also need to get rid of religon, and everyone heres should know why already.
also, i havent done any "hardcore" revisions, dont think these ideas are concrete.