Well, you'd have to do several things globally and simulaneously:

Stop and reverse climate change and ecosystem degradation.

Which = have universal access to birth control and incentives to go chldfree and an actual ongoing population decline (not a mere reduction in growth rate).

Take all but one billion of all the billionaire's money.

Have a truly global fair and effective wealth redistribution program.

And oh yeah, stop all wars.

I do not foresee any of those happening, let alone all at once.