Totally anecdotal but I think phones have made us less present, or said another way, less capable of using our brains effectively. It isn't exactly dumb but it feels very close.

I definitely think we are smarter if you are using IQ, but are we less reactive and less tribal? I'm not so sure.

Modern dumb people have more ability to affect things. Modern technology, equal rights, voting rights give them access to more control than they've ever had.

That's my theory, anyway.