Unethical twin studies are illegal for very good reasons, but I'd be curious about the results of the following hypothetical (albeit flawed) study:

• Twin 1: raised in a small village fishing/farming community that disallows internet access, but allows full unfettered access to a vast library.

• Twin 2: raised in a heavily populated coastal city with a smartphone from age 6.

A constant, instant stream of knowledge of horrific things happening hundreds or thousands of miles from you, and the barrage of social media toxicity, must come a negative mindset about the world. I don't see any way it doesn't. Sure there is wholesome and humble content on every platform, but the vast majority is either neutral or negative, and negativity generally spreads much faster than neutral or positive; it's the human condition.

It affects everyone, but your reality will be much different if it's been affecting you since you could, quite literally, remember.

I've seen multiple grassroots efforts of insightful teens who recognize this and are going dumbphone-only. Those kids are the future I'd place my bet on.