Honestly, just do whatever you can do that let you sleep well at night. It's all most people can do. Maybe we can't stop these things, but eventually we all die, even those in power. What we can do is not being part of the problem and teach those who come after the same in hopes that in the future (if there's one) there will be more good people than bad.
Just keep your conscience clean in hope that the next generation get inspired by that.