The loneliness of Generation Z reflects not just rising social media use but a broader decline in interactions with neighbors, co-workers and church friends.

At a time when we’re supposedly more connected than ever, there are an awful lot of lonely people.

“Nearly half of Americans report sometimes or always feeling alone or left out,” according to a new survey from health company Cigna. One out of five Americans has no person they can talk to.

And the loneliest generation? That would be Generation Z, defined in this survey as those 18 to 22. Their average loneliness score is nearly 10 points higher than the least lonely generation — the Greatest Generation, those 72 and older.

While it’s tempting to blame Gen Z’s reliance on smartphones and social media, the data don’t bear that out: The survey didn’t find a significant difference in loneliness levels between those who used social media often or infrequently.

At a time when we’re supposedly more connected than ever, there are an awful lot of lonely people.

“Nearly half of Americans report sometimes or always feeling alone or left out,” according to a new survey from health company Cigna. One out of five Americans has no person they can talk to.

And the loneliest generation? That would be Generation Z, defined in this survey as those 18 to 22. Their average loneliness score is nearly 10 points higher than the least lonely generation — the Greatest Generation, those 72 and older.

While it’s tempting to blame Gen Z’s reliance on smartphones and social media, the data don’t bear that out: The survey didn’t find a significant difference in loneliness levels between those who used social media often or infrequently.

One initiative to encourage Gen Z should be #WalkUpNotOut, a movement that urged high school students to reach out to students perceived as socially isolated after the tragic high school shooting in Parkland, Fla. Regardless of your position on gun control, it can only help to have students focus on being kind and welcoming to each other, particularly when the pervasiveness of social media has made it increasingly easy to bully both on and off campuses.

Plus, this encourages face-to-face interaction — and the Cigna survey found a huge difference in average loneliness scores between those who had daily meaningful in-person encounters and those who didn’t. (Astonishingly, one of five Americans surveyed reported having such encounters less frequently than once a week.)

It’s also important for Gen Z — and other Americans — to take “social capital” seriously. Thanks to the erosion of neighborhood communities, the fracturing of many families and the decline in church attendance, there are fewer and fewer opportunities for finding new friends or developing meaningful relationships. And that puts even more pressure on students. Imagine being unhappy at school and having no other community to turn to.

According to a 2017 report prepared for Sen. Mike Lee, R-Utah, several factors show the decline in our interaction with each other:

► Monthly church attendance fell from the early 1970s to the present, with 50% to 57% attending in the past compared with 42% to 44% now.

► In 1974, a third of Americans spent time socially with their neighbors several times a week. Now, only 19% do.

► We’re also spending less time schmoozing with our co-workers, going from an average of 2.5 hours a week in the mid 1970s to just under an hour in 2012.

► Families are also becoming smaller, and the percentage of children raised by a single parent or no parent has doubled, from 15% to 31%.

Given these declining numbers, it makes sense that more Americans are falling through the cracks, losing ways to get to know other people.

And if Gen Z is using phones instead of in-person interactions, that could be contributing to these young adults’ loneliness. In an Atlantic article last year, psychology professor Jean Twenge highlighted how teens were less interested in driving and getting out of the house than past generations.

Describing one unnamed 13-year-old, Twenge wrote: “She spent much of her summer keeping up with friends, but nearly all of it was over text or Snapchat. ‘I’ve been on my phone more than I’ve been with actual people,’ she said. ‘My bed has, like, an imprint of my body.’ ”

That’s not healthy — and if these are the habits Gen Z is developing in these crucial years, it doesn’t bode well for this generation becoming less lonely in the future.

The American writer Flannery O’Connor, a Catholic, was fond of a prayer that included these lines, “Raphael, lead us toward those we are waiting for, those who are waiting for us: Raphael, Angel of happy meeting, lead us by the hand toward those we are looking for.”

You don’t need to be religious to realize that we both need — and are needed by — others, and that our own lives grow in meaning through many of our interactions with others.

It’s easy to toss out opinions on Facebook or on bumper stickers, but at the end of the day, one of the most powerful things many of us may do to change the world could be our “hello" to someone, our reaching out to that person who seems in danger of being on the fringe, making eye contact and sharing a smile with a homeless person even if we don’t have change. Let’s look up from our phones a little more often — and start acknowledging the people right in front of us.