[crispinb]

Any proposed approach to large-scale change that essentially says 'billions of people should just do x', regardless of the nature of x, is dead before it starts. That's not how change works. Contra the simpler-minded pop variants of libertarianism, humans just don't spontaneously decide on their patterns of life. Indeed that we don't is almost as good a definition of what it is to be human as any: we are acculturated beings to our core.

There are a bunch of ways large complex cultures have empirically (historically) been shown to change - via external shocks, leadership, social movements, technological innovation etc. Not one of them involve billions of people all spontaneously deciding to be exceptional (a mathematical impossibility!) and behaving counter-culturally as you might wish. If that's your only hope, we're done.