The U.S. economy has been cratered less by the coronavirus than by the response to it—driven by the undemocratic idea that “science” should rule, even when much of the science and the data behind it remain in dispute.

We’re told in this plague year that politicians have no role—in essence, that the people have no real rights against consensus science, which can demand that we forfeit our liberties and suspend the Constitution. Political leaders, elected to exercise judgment on our behalf, must defer to doctors, because the...