Immigration is a big part of what distinguishes the U.S. from, say, the EU. Immigration makes us younger. Immigration makes us smarter. Half of all Silicon Valley start ups have a co-founder no more than one generation separated from an immigrant. Immigration makes us work. The U.S. fertility rate is below 2.1, so it’s immigration that pushes us above replacement level growth.

But don’t gloat. There are cracks in our armor….

Derek Thompson in The Atlantic (via emmabond)