One of the greatest pieces of evidence demonstrating that the family/rearing environment has no effect on eventual outcomes is the absence of birth order effects. Birth order is an excellent test for these effects: it is something that systematically differs between siblings and is bona fide non-genetic (mostly). Hence, it's a great way to see... Read More

A new study (recently discussed by Steve Sailer) has found that the children of gay and lesbian parents have a lower high school graduation rate than those of straight parents. The finding of this study seems straightforward – indeed, I was able to say it in a sentence. However, the conclusions we are able to... Read More