Revolutions are context dependent. You can't have a global revolution because it covers too many contexts. Global revolutions that do happen will be based on the contemporaneous development of local revolutions, that is to say a global revolution is a descriptive bottom up phenomenon, not a top down one.
You focus on your context. You figure out what that means. You do your part. Let other people do their part. You may find yourself as part of a global phenomenon, you may not.
Also, think about what a revolution is. It's a replacement of a power structure. Globally, you could have a revolution against the UN, maybe. WTO? IMF? But you would have to get through your local power structure first.
So you focus on replacing the power structure in your context. Others focus on replacing the power structure in their context. And that's how it goes.
Yeah... so, recognizing that population competition is one of the ways that dominance can be exerted, China choosing to limit birth rates of the most populous ethnicity, which happens to be the dominant one, would be the opposite of eugenics used for reinforcing dominance. It's actually an incredible defense of China because it shows that not only are they nothing like the West, the West can't even conceive of what would motivate the dominant people to restrict their own privileges to reverse historical trends caused by dominance of their forebears.
You've got to be kidding comparing the One Child Policy of the dominant ethnic group, which the government itself was predominately composed of, and literal genocide and cultural genocide of white supremacists against the people they violently colonized.