Photo by humberto chavez on Unsplash

Many forces shape the earth. It is shaped by the wind, by water in rivers and oceans, and the freezing and the thawing in soil and rocks. It is shaped by life, and especially by human beings and their movements back and forth across the face of the planet. Just as we cannot control the wind or contain the water in the oceans, we cannot prevent the movement of peoples across imaginary lines arbitrarily drawn on maps…