Because these societies incentivize individuals to behave and conform for the better of the group, while iterating on their systems. The same way the US has ite

Because these societies incentivize individuals to behave and conform for the better of the group, while iterating on their systems. The same way the US has iterated on their car-centric culture. Take the money and incentives away from building roads, cars, parking lots, traffic safety etc. and stick them into systems which are safer by default, incentives for people to keep things clean and not cause a fuss.