American sociologist Robert Nisbet once described conservatives and libertarians as “uneasy cousins.” The description is apt. While sharing a family resemblance and many of the same political rivals, conservatism and libertarianism are fundamentally at odds. This paper explains why this is so from the conservative perspective. It surveys the starting points and major themes of conservatism and libertarianism. It identifies what conservatives and libertarians agree about. It concludes by showing what conservatives have against libertarianism.