The 5-HTR1A gene affects whether we more easily make relative versus absolute judgments. And this seems to be true for everything from the length of lines, to quality of life. The allele that is most common in East Asia makes relative judgements easier, in America it is absolute judgements that are easier.
Politically, having the relative form of the gene encourages more community thinking while the absolute encourages more individualism. This leaning holds within whatever society you're in. But when a culture is dominated by one form of the gene, it will naturally shift the entire society.
I learned this from pages 183-186 of https://www.amazon.com/Whos-Charge-Free-Science-Brain/dp/006... and I've wondered ever since how many of my opinions are reason (as it feels) versus genetics.
It's a cultural thing. Asian cultures vary dramatically between each other (don't mistake Koreans, Chinese, or Japanese for each other -it won't end well), but they have one thing in common: They have a real sense of every person is part of a collective. Maybe it's because most Asian societies are quite crowded.
The US, on the other hand, has a real sense of everyone is an individual, to the point of actually considering people that follow rules and norms to be "sheeple" (see "antimaskers").
Europeans seem to be in the middle.