A quick summary:
Basically, Earth is in its twilight era for human life, due to whatever catastrophe. It's extremely hot, overpopulated, tides have risen, etc.
Previous Earth had sent teams to Mars to start colonizing, and now the wealthy and powerful are taking the last ships to Mars.
Generally, my story follows a variety of characters as they try and make their way to Mars and break free of the social order/establish a better society on Mars. Some make it; others have to figure out what to do with a bleak future.
It's probably not a bad idea to centralize the political opposition into a single "group" or political entity, to help narrow the plot down. That said, the scale is pretty huge right now. I'm trying to think if there's a more pressing/immediate situation that I can put everyone in, with a more tangible goal than "societal change."
I guess as I write this, I'm wondering if the story was broken into parts, if each part should have its own more immediate plot (i.e, Book 1's objective for everyone is "get off of earth"), and that way the overall social commentary can be a general, overarching theme as opposed to a strict goal.
Anyway as you guys can probably see I'm all over the place on this right now and I'm trying to avoid flailing