How to improve America: Encourage families to have girls.

And if people insist on having sons, they have to be only children.

Here’s why. There’s a new study out titled “Childhood Socialization and Political Attitudes: Evidence from a Natural Experiment.” And it finds:

Having sisters makes males more politically conservative in terms of their gender role attitudes and their partisanship. Particularly for gender role attitudes, we find that these political socialization effects persist until respondents are well into adulthood.

So, all we have to do is eliminate boys with sisters ... and we’re in business!