The other issue with "personal responsibility" is that even if the economy doesn't collapse, unless you get almost everyone on board, it's basically a form of J

The other issue with "personal responsibility" is that even if the economy doesn't collapse, unless you get almost everyone on board, it's basically a form of Jevon's paradox. For every steak you don't eat, someone else quite literally will just eat two. If you stuff yourself into a small apartment, in the absence of regulation, that's just leaving someone else more space to build in the countryside. And so on and so forth. You can't fix negative externalities by just not doing them, decreasing the demand and then hoping someone doesn't do them at the now reduced cost, they need to be priced in.