Well, you could launch a war with Iran, for one. That's looking like a good way to destroy the global economy.

The global economical system with its built in assumption of infinite growth is on a collision course with the material realities of the world. So it will either change drastically, or collapse. The latter seems much more likely.

I think cracks will form and new, more local, decentralized and equitable frameworks will sprout from those cracks as people help each other, because the system can't or wont help them.

we're doing it already, climate change

That is an excellent question.

Find a common goal that catches peoples interest and is widely agreeable/acceptable but goes against current politics.