Nations, like people, may change somewhat, but not in their essential characteristics. The United States is defined by space and hope. It is an optimistic country of can-do strivers. They took the risk of coming to a new land. They are suspicious of government, inclined to self-reliance. Europeans ask where you came from. Americans ask what you can do.

The Declaration of Independence posited a universal idea, that human beings are created equal, that they are endowed with certain inalienable rights, and that among these are “life, liberty and the pursuit of happiness.” Americans, then, embraced an idea, however flawed in execution, when they became a nation. Their government, whatever else it does, exists to safeguard and further that idea, in the United States and beyond.

President Trump, in the name of making American great again, has trampled on America’s essence. He is angry, a stranger to happiness, angrier still for not knowing the source of his rage. He is less interested in liberty than the cash of his autocratic cronies. As for life, he views it as a selective right, to which the white Christian male has priority access, with women, people of color and the rest of humanity trailing along behind for scraps.

Adherents to an agenda of “national conservatism” held a conference last month in Washington dedicated, as my colleague Jennifer Schuessler put it, “to wresting a coherent ideology out of the chaos of the Trumpist moment.”