" Ethics, too, favors open borders. Say John from Texas is dying of hunger. He asks me for food, but I refuse. If John dies, is it my fault? Arguably, I merely allowed him to die, which while not exactly benevolent, isn’t exactly murder either. Now imagine that John doesn’t ask for food, but goes off to the market, where he’ll find plenty of people willing to exchange their goods for work that he can do in return. This time though, I hire a couple of heavily armed baddies to block his way. John dies of starvation a few days later. Can I still claim innocence? "

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