This excellent piece by economist Eric Beinhocker radiates moral clarity: History tells us that mass social movements always have a moral argument at their core. The anti-slavery movement only took off once white people in Europe and America began to see people of African descent not as property but as people. The argument that won wasn’t over the economics of slavery, or whether slavery was in the self-interest of white people or not. The argument that mobilized the abolition movement, and eventually gave it political power, was that enslaving other human beings is evil and had to be stopped...