Jonathan Haidt

So all of this is miraculous.

So our kids love it.

And we're all like, well, OK, they're spending a lot of time on it.

But maybe it's making them smarter.

It's going to teach them tech skills.

So this is all good, we thought.

That's the setup.

And if you were born in 1990, let's say, then you hit puberty around 2002, 2003.

You go through puberty with a flip phone.

You use your flip phone to call your friends and to text them one-on-one, and you meet up, and you do things in the real world.

So you have a normal human development, normal human puberty, and you come out the other end as a mentally healthy person.

But suppose you're born in the year 2000.

You are seven when the iPhone comes out.

You got a front-facing camera in 2010, high-speed internet.

You are 11 when you probably got one.

You got on Instagram when you were 12.

So when you hit puberty, you're going through puberty not meeting up with your friends.

You're going through puberty swiping, tapping, liking, and hanging on.

What if I post something?

How will people react?