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rice farming produces much more volume of food but requires more collective efforts and precise management (water control, etc.). As a result, it will sustain more population but the consequences are much severe if the collective efforts and management fail.

wheat farming can be done by individual farmers without collective effort, but the amount of food is limited, so the natural selection of survival is inherently much harsher.

If you read asian fables, brother and neighbors help each other, and stories often antagonize the ones being selfish, like Nolbu.

If you read western fairy tales, it is almost always about a process of elimination. Older brothers take all the inheritance, younger ones only get cats or donkeys or magic beans…..