" We’re indignant that men get paid more than women for doing the same work, and that white Americans earn more than black Americans. But even the 150% racial income gap of the 1930s pales in comparison to the injustices inflicted by our borders. A Mexican citizen living and working in the U.S. earns more than twice as much as a compatriot still living in Mexico. An American earns nearly three times as much for the same work as a Bolivian, even when they are of the same skill level, age, and sex. With a comparable Nigerian, the difference is a factor of 8.5 – and that’s adjusted for purchasing power in the two countries. "

― Rutger Bregman , Utopia for Realists: How We Can Build the Ideal World