At Law & Liberty today, I review Yale Law Professor Jack Balkin’s new book on tradition in constitutional law, Memory and Authority. Balkin makes some good points. He correctly describes how lawyers and judges use tradition in practice, and is right that the appeal of tradition–which is often multifarious and contested–depends on whether listeners feel connected to the past in the first place. But, I argue, Balkin’s definition of tradition is so elastic that it sometimes seems he isn’t talking about tradition at all:

For example, he praises Obergefell v. Hodges, which held that the Constitution confers a right to same-sex marriage, for its correct use of tradition. True, there is no “history of specific legal guarantees for same-sex marriage in American law.” But he argues that American tradition should be understood in a broader, more sensitive way, as a commitment to animating principles. The Obergefell Court correctly saw that the reasons why Americans historically have supported marriage generally obtained in the new context of same-sex marriage as well, and applied those reasons to reach a satisfactory present-day result. One can “alter or even reject existing practices,” he writes, “while being faithful to the country’s traditions of liberty.”

Now, one can praise or criticize the Court’s reasoning in Obergefell. But to paraphrase something Grant Gilmore said about Oliver Wendell Holmes in a different context, the magician who can traditionalize Obergefell can, the need arising, traditionalize anything. Tradition refers to concrete practices and accommodations that endure across time in a community, not abstractions like “liberty” or “equality” or “dignity” or “justice.” And one cannot plausibly claim that same-sex marriage is an American tradition in that sense. One must choose which traditions to follow and which to discard; that is the essence of modernity. But one cannot decide a case according to an abstract, indeterminate principle and call oneself a traditionalist. One may as well say that one is doing something new—that one is deciding a case based on one’s normative commitments and leave it at that.

You can read the review here.