@WandererUber >you just go your separate ways and only those who paid for the library can use it afterwards
So when half of the people think that the defense budget should go towards expanding the navy, and the other half think it should go towards modernizing the army, you end up with a navy that cannot properly project power because it only has half the desired size, an army that is either forced to downsize or use multiple weapons platforms because there were not enough funds for a total modernization, and worst of all; the navy doesn't protect the national interests of army-voters and vice versa.

>that's just for governing flawed people
Humans are social, not "eusocial". If we ever were to become eusocial, then we would be something other than human, I'd say.
I am not particularly religious, but mankind is inherently flawed from everyone's perspective as long as there exist people who are different from oneself.

>Why? High empathy plus high in-group preference...
This creates a pacifist racist, and that is assuming you can somehow direct what a person considers their "in-group" to be racial, rather than based on something like political lines, gender or even hobbies.
"I would never hurt a gamer, but a cyclist I would run over if it was permitted."

>there is no 'cultural', psychological traits are genetic and culture arises from biology
Cultural trends arise from said biological genetics, but specifics are directed by powers such as politicians, media and celebrities.
There is for example a strong tradition for celebrating mythical warriors in Germanic peoples, yet this has not been done for generations. How can this be? Has the Germanic genetics disappeared? No, cultural expression has simply been directed away from this tradition by political and media powers.