Three dissents by the late U.S. Supreme Court Justice Antonin Scalia will one day be the law of the land, D.C. Circuit Judge Brett M. Kavanaugh predicted June 2.

Those dissents span four decades and issues of executive power, detention of U.S. citizens and deference to federal agencies.

But they all have one theme—liberty, Kavanaugh said.

Kavanaugh made the predictions during a keynote speech at an administrative law conference hosted by George Mason University law school, Arlington, Va.

The school...