That feeling when your knowledge about how average IQ varies with caste rank in India stops being peculiar arcana and suddenly becomes deeply relevant to US domestic politics... Anybody who has studied the matter knows that castes in India have been maintaining almost perfect endogamy for thousands of years. About the only significant category of exceptions is that if you have an exceptionally beautiful daughter you *might* succeed in getting her taken as a concubine by a higher-caste man, so their offspring might jump a rank. With no significant gene flow between jatis, divergences in important traits like IQ and time preference not only don't smooth out, but actually amplify due to genetic drift and differing selective pressures. Highest-caste Indians have an IQ distribution a lot like Europeans. Low-caste Indians...don't. They're not quite as genetically handicapped as the dimmest populations in sub-Saharan Africa, thankfully, but the spread is wide. This doesn't mean all low-caste Indians are stupid; Gaussian distributions don't work that way. It does mean that importing 10,000 low-caste Indians has very different implications for the host society then importing 10,000 Brahmins. Segue to the recent news stories about American families getting killed by illiterate Indian truck drivers doing crazy stupid things on the roadways. Those truck drivers are not Brahmins. This is a recent phenomenon because, until one of our political parties decided to import the entire Third World for vote-farming purposes, we were cream-skimming India. Now we're not, and this makes a serious difference.

my OB, upon learning that I'm of British descent and my husband was Korean, said "ahh excellent, your children will have hybrid vigor" which is a thing I'm pretty sure you're only supposed to say about animals

Vision without execution is delusion.

Most people still don't know how to hire. I've messed up enough times to feel strongly about one thing now: The best employees I've worked with are all very, very curious. 1/ Now I know how to find curious people and hire them: