Now, if you have the leisure time, influence, and/or money to get involved in these things, by all means, do so. The fact remains that a lot of us don't, and trying to be involved in them is going to turn us into unpleasant cranks who are dogmatically committed to certain points of view and won't shut up about them. I've been one of those people, and it wasn't very fun.
Fixating on this big-picture stuff will drive you crazy if you pay too much attention to it, and despite having been tangled up in it for most of my life, I need to take a step back and concentrate my efforts on the parts of this world that are going to do the most good. I have to connect with friends, work on the small things in my life and my several communities that I can affect, and disconnect from the things I can't. Depending on my discipline and my health** I probably have a little over a couple decades left to me in which I can do things for friends, family, and other folks I care about. "And maybe they'll be happy for a while." One can hope.
*Minutes before an audience where everyone expects the paranoid Governor Barholm Clerett to order Raj executed.
**Yeah, I'm fucked.