Libertarians need to grasp the following facts:

According to the CIA World Factbook, the total population of people living in countries poorer than Mexico is up to 5,043,000,000. That’s 77% of the world’s 6,525,000,000 population.

Almost three billion people (2,965,000,000), or 45% of the world, live in countries with less than half of Mexico’s $10,000 per capita GDP.

An extraordinary 85% of the world’s children ages 0-14 live in countries poorer than Mexico (1,528,000,000 out of 1,789,000).

Compared to Mexico’s 33 million children ages 0-14, countries poorer than Mexico have 47 times as many children.

India has ten times as many children, China eight times as many, and Pakistan three times as many. Indonesia has almost twice as many children, Nigeria 1.7 times as many, and Bangladesh and Brazil 1.7 times as many. Ethiopia, the Congo, and the Philippines have almost exactly the same number as Mexico.

It’s likely that you have to be fairly close to as rich as Mexico to get a big flow of illegal immigrants going, as Brazil has begun recently. Of course, if the Senate’s guest worker program passes, we’ll start seeing a big influx from places like Indonesia, Bangladesh, and Pakistan, followed by illegal immigrants coming to stay with their legal relatives.