Clark's findings make decades of inequality studies by economists look silly. Their confirmation bias blinded them and they wasted a lot of time and pushed a lot of bad policies as a result.
When we know all the genetic variations that contribute to social competence and economic success it should be possible to do a much better job measuring the efficacy of societal institutions (schools, regulatory policies, courts, markets) in enabling people to achieve their genetic potential. Quite a few policies are based on very wrong (tabula rasa) assumptions about human potential. We could have less stupid policies we stopped pretending outcomes are purely based on social environment.
In the West the resistance to a realistic view of humanity will last for many years beyond the point where advances in genetics and neurobiology disprove most tenets of secular faiths. But I expect many East Asian governments will rather eagerly apply actionable results from sciences of human nature and their societies will reap big benefits as a result. Rulers in Singapore, Taipei, Beijing, Tokyo, and Seoul in particular will make more realistic policies based on science.
Out of the East Asian governments I expect Singapore is the one that will benefit the most. Singapore already has an immigration policy aimed at attracting professionals and a government willing to do more realistic social engineering (as compared to Marxist social engineering). Imagine what Singapore might do with genetic tests on prospective immigrants: only let in those whose genetic profiles for social behaviors and intellect will create an extremely prosperous society.
Singapore might end up serving as a model for some other small sovereign jurisdictions. Any small government willing to set up laws to let in only those with the most social competence and creative potential could create conditions for a far more successful than any currently existing. Such a transformation is easier to do to a smaller society because it is easier to find enough high functioning people to create a new majority for a smaller society than for a larger one. A society with too many bad starting conditions (a large existing population, bad location, harsh weather, high crime, etc) will not be able to do this transformation. I think we will witness a global sort where the most talented and able people concentrate in some smaller countries with highly selective immigration laws.
Also see Gregory Clark's previous book, A Farewell To Alms, which outlines the selective pressures for both genotypes and norms and beliefs that cause higher economic success.