KAROL MARKOWICZ: An epidemic of teenage … loneliness.

Rates of major depressive episodes in the last year jumped 52 percent among adolescents aged 12 to 17, the study noted, and 63 percent among young adults aged 18 to 25.

It’s not just the blues, either. ­“Serious psychological distress” and “suicide-related outcomes (suicidal ideation, plans, attempts and deaths by suicide)” also spiked among the young last year.

What is going on here?

The lives of our modern youth should be pretty good. They have all the information in the world on devices they carry in their pockets. They have plenty of opportunities to make friends instantaneously — something the older generation finds increasingly difficult.

And notwithstanding what the insurgent Democratic ­Socialists keep telling us, this is a time of unparalleled prosperity. The ­unemployment rate is 4 percent. Most American families enjoy conveniences that would have been unthinkable to most human generations, across most of history. Life should be grand.

But perhaps those very conveniences are the source of youth ­anguish.

Karol blames social media, at least in part. So do I, and I bet Glenn does, too.