You already know, what you personally can do - nothing. Imagine asking what you can do, to stop the sun from rising tomorrow. Your question is not too far off.

You already know, what you personally can do - nothing. Imagine asking what you can do, to stop the sun from rising tomorrow. Your question is not too far off. The world is going to go, the way it's going to go. If you've ever tried to get a relative or friend, or gasp yourself, to cease a harmful habit or pick up a good habit (getting in good shape, quitting smoking, etc) - you'll know how much or how little you can do to stop anyone, from doing anything. So really, the answer to your question is - pick something you know you should do, but aren't doing, and go do that with any consistency. Something that is unquestionably positive - not something along the lines of changing others. If you can stick with it, do one more, or do one less of what you know you shouldn't do. Repeat. If you can do that with any consistency - you'll quickly become a role model to some, and have a positive impact on society as a whole, which's what you seem to really be after. There's a path of violence - that appeals largely to young people, and then the path of peace, that one gets around to, usually when there's no more you can accomplish with violence, and lots to fix. Path of violence is thinking if only others were more like me, the world would be a better place. The path of peace is realizing that's a delusional thought, and that if you want to get along with others, that's a counter-productive way of living your life. Everyone wants to get along with others - not everyone is smart/wise/whatever enough to realize the place (violence) their attempts are coming from, is at least half the problem.