Jakethesnake - the title doesn't imply genetic proneness at all, it could just as easily be proneness due to cultural conditioning.
However, if AFCism has been culturally ingrained into most east and southeast asian cultures through thousands of years, through confucianism, and the encouragement of obedience, piety, social conformity and respect for authority, it suggests that a genetic tendency for it may have also been hardwired into the psychology. This is simple darwinism.
The people who studied hard, respected, obeyed and conformed would have proven the most successful in their society. These people would have bred more prolifically and passed their genes on, while the bold, risk taking, non conformers would be outcast and jailed/executed or at the very least, not married due to social stigma. Thus after 100 generations we may very well have a society which is both genetically and culturally conditioned to be prone to AFCism.
Remember that for thousands of years in Chinese culture women would not marry and breed because they were attracted to their partners, but because of
1. Financial reasons - they wanted a wealthy husband who could support them and their families
2. Familial pressure - marriages would be arranged by the family, not the individuals
Who were rich, socially desirable men who women were most pressured into marrying then? Why, the academically gifted, respectful and conformist men who were given status in society. These were the men who were promoted to the ranks of the Mandarin or scholar gentry, or the one with the largest and most influential families in the district.
In Chinese society Women had very little freedom to choose who to marry, and adulterous affairs were unlikely.
Chinese society would use methods like footbinding to control their women and restrict their mobility and freedom. Essentially, women would be FORCED to marry and breed with men whom in another society, would have genetic behavioural tendencies that would make them unattractive. These men may have been intelligent, but by no means bold, outspoken, or naturally assertive, the qualities which we ascribe to the 'alpha male' who gets all the women.
Please note that this is pure speculation, I have no statistical evidence of Asian genetic preconditioning, nor am I aware of any formal studies having taken place to this effect. But it does make logical sense.
As far as I know, due to genetic breeding tendencies and their culture/environment, certain nationalities of person will be physically larger in general, more even tempered in general, more intelligent in general etc. It follows that the same would apply to AFC tendencies.