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Jonathan Last says that fears over immigration are overblown. As fertility rates drop in developing countries around the world, they’re going to send fewer immigrants our way no matter what policies we adopt:

When it comes to immigration, demographers have a general rule of thumb: Countries with fertility rates below the replacement level tend to attract immigrants, not send them. And so, when a country’s fertility rate collapses, it often ceases to be a source of immigration

….Many Latin American countries have already fallen below the replacement level. It’s not a coincidence that sub-replacement countries — such as Uruguay, Chile, Brazil and Costa Rica — send the U.S. barely any immigrants at all. The vast majority of our immigrants come from above-replacement countries, such as Honduras, El Salvador, Colombia, Guatemala and Mexico.

But even though they’re still above-replacement, those countries are witnessing epic fertility declines too. Consider Mexico, which over the last 30 years has sent roughly two-thirds of all the immigrants — legal and illegal — who came to the United States. In 1970, the Mexican fertility rate was 6.72. Today, it’s hovering at the 2.1 mark — a drop of nearly 70% in just two generations. And it’s still falling.

The result is that from 2005 to 2010, the U.S. received a net of zero immigrants from Mexico.

I had a funny feeling as I was reading this: I felt like I should have heard about this before. Or that I should have already known this. And yet, I’m pretty sure this is the first time I’ve seen anyone make this point.

It’s a seductive one. I have an enormous fondness for explanations that rely on big, broad trends: demographics, money flows, growth of computing power, etc. That naturally means I’m a sucker for Last’s argument here, despite the fact that I don’t really buy his whole “demographic doom” schtick about America’s falling birth rate (which he’s on a book tour promoting at the moment).

Still, the fact that Last has successfully pushed one of my buttons doesn’t mean he’s right. It just means I’m intrigued by his argument. I think I need to read more about this.

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We've never been very good at being conservative.

And usually, that serves us well in doing the ambitious, hard-hitting journalism that you turn to Mother Jones for. But it also means we can't afford to come up short when it comes to scratching together the funds it takes to keep our team firing on all cylinders, and the truth is, we finished our budgeting cycle on June 30 about $100,000 short of our online goal.

This is no time to come up short. It's time to fight like hell, as our namesake would tell us to do, for a democracy where minority rule cannot impose an extreme agenda, where facts matter, and where accountability has a chance at the polls and in the press. If you value our reporting and you can right now, please help us dig out of the $100,000 hole we're starting our new budgeting cycle in with an always-needed and always-appreciated donation today.

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