Kant’s Groundwork launched a devastating critique of utilitarianism. It argues that morality is not about maximizing happiness or any other end. Instead, it is about respecting persons as ends in themselves. Kant’s Groundwork appeared shortly after the American Revolution (1776) and just before the French Revolution (1789). In line with the spirit and moral thrust of those revolutions, it offers a powerful basis for what the eighteenth-century revolutionaries called the rights of man, and what we in the early twenty-first century call universal human rights.