And Asians outscored them all. What factors do you think led to that?
I have not studied that branch of sociology. I will offer an uneducated guess though. I believe that Southeast Asian countries are heavily populated, historically, they have faced many hardships like famine, war, and government oppression. That forced family members to work very hard right away from a young age. Culturally, many families live together in large family units with grandparents, children,aunts, uncles, cousins etc.
Everyone contributes and resources are pooled and managed by the patriarch or matriarch. The elder family members are respected, obeyed, and the children learn from them values like hard work, respect, moderation, and really maturity is the best word. The adults have very high expectations of the children and expect them to work or go to school, depending on their social class. In turn, the children have hard working family oriented adults in the house as role models.
On top of this self perpetuating system, they have a proud history of being masters of inventions in science and warfare like gunpowder, the crossbow, steel, silk, and for example China was a vast empire over 1000 years before Christ with money, government, and philosophy writings. Japan has an uninterrupted Empirical bloodline dating back to the time of Christ.
So to sum it up, the SE Asian people figured out how to live like 5,000 years ago. They are just continuing to do what they've been doing for thousands of years which is excelling at everything through respecting their elders, their families, and their culture
PLUS: They always look out for each other by hiring, promoting, and referring family and friends first in any kind of business, they spend money with each other not letting the money go out of the community, only in. That is just like most immigrant, ethnic, and religious groups that financially stick together.
My uneducated guess. I pray I did not offend, stereotype, or in any other way disrespect anyone's culture or ethnicity. Please correct me if I have misunderstood or misrepresented anyone's SE Asian culture.