A note on overtourism, solve for the equilibrium

“At the end, this story is just a numbers problem,” Mr. Tourtellot said. He noted that in 1960, when the jet age began, around 25 million international trips were taken. Last year, the number was 1.3 billion.

As for the cities that are the major destinations? They are “the same size they were back in 1959, and they’ll probably stay that way,” he said.

That is from Farhad Manjoo at the NYT.