I think the trillion-dollar propaganda machine has two components.

The first part convinces people not to care.

The second part targets people who do care and convinces them not to act, because the problem is so big and the difference you can make is so small and there's no hope of changing the inevitable and so on and so forth.

And too many good-hearted people who overcome the first part fall for the second.

So for anybody who needs to hear it:

You matter. You matter because you care about the problem. And you do have the power to contribute to the solution. Don't let anybody tell you otherwise.