America is full of visible and invisible walls. In the first half of the last century, our politics had been dedicated to tearing down the walls between classes, races and genders. And then in the second half of the century, radicals terrified of what that meant for their plans, began building them up again while adding new divisions until every city, workplace and even family is divided by many invisible walls. Walls represent divisions. Whether you support or oppose a particular wall depends on whether you believe a division is legally, morally or philosophically legitimate. The walls that the radicals...
