[mjburgess]

> And it wasn't like society was significantly more aggressive than it is now.

Yes it was. Much, Much, Much more.

Murder and violence, domestic violence. Society 40 years ago was radically different than it is now, and most of the 20th C. was a very violent time.

[rrauenza]

This supports that, yes, it was more aggressive 40 years ago, and simulatenously remind us that correlation isn't always causation:

https://www.forbes.com/sites/alexknapp/2013/01/03/how-lead-c...

[mjburgess]

Yes, but then there's studies showing spanking children makes them more aggressive. The physical abuse of children is by the physically abusive who were themselves physically abused.

It isnt merely accidental. Of course it isnt the explanation for WW2, or the 1970s murder rate. Neither is lead.