High density societies engender a higher default level of goo(tm)*
This goes hand in hand with high co-ordination high co-operative activities. And rice.
Wheat comes from the steppes and the deciduous. Their culture is more loosely bound, individualistic, allowing lot of free movement in wilderness, hence fending on their own a lot. Still there is a lot more win-win thinking than compared to desert cultures ,where territorial harshness leads to win-idontcare strategies thriving blooming.
The Japanese are, by default, considerate of the impact of their actions on others.the Others live rent free in their head. In my family they call it dakshinyam or obligation, it's the culture of never saying no to anyone asking them anything. The one who asks shamelessly, wins. With the centre not holding , with the elders not available to generate a code of conduct as rapidly as the demographics and the techno-economics changes, the herd-cells are at a loss,
* Alan watts prickles &goo theory