Rex Tillerson’s departure as secretary of state fills me with terribly mixed feelings.

On one level, he wasn’t by any stretch my favored pick to lead the nation’s diplomatic effort. He came from big business; he had no real international political experience; he was unable to fill key posts within the State Department.

However, he is a grownup. He clashed with Donald John Trump. He sought to talk the president out of backing away from the Iran nuclear deal; he opposed Trump’s decision to pull out of the Paris global warming accord.

Tillerson realizes a fundamental truth about the world and the United States’ role in it, which is that “globalism” is the more realistic approach to cultivating our nation’s alliances. Trump ran for president as a “nationalist.” He wants to “put America first,” but is putting our nation’s world standing in jeopardy.

Trump has nominated CIA Director Mike Pompeo to succeed Tillerson. Pompeo is from the same nationalist mold as Trump, as he demonstrated while he served in the U.S. House of Representatives before making the move to the CIA.

The nationalist wing of the Trump administration is winning the argument within the White House’s walls so far.

Trump keeps harping about America’s interests, which in its way is the height of irony, given his reluctance to condemn the Russians for attacking our nation’s electoral process in 2016.

He has cut loose someone, Tillerson, who believes that the world’s inexorable shrinkage forces this country to think more globally. We cannot escape the influences of other nations and we must be mindful of their concerns.

Should we place other nations’ interests on the same level as our own? No. Neither should we snub them, as Donald Trump seems so terribly inclined to do.

I also must concede that the comment attributed to Tillerson — which he hasn’t denied making — that Trump is a “moron” seems more truthful than ever.