Well, I'm not naive enough to believe I can change the world. But, I can change my life in ways that don't perpetuate the problem.
For example, I haven't worn makeup for 6 or 7 years now. Why should women paint their faces just to be presentable? I like myself just they way I am, and if others don't, that's their problem. I refuse to give my hard-earned money to some company for a bottle of goop that supposedly makes me look prettier. My daughter is slowly starting to follow my example, too. Not because I told her to, but because she has better things to spend her money on also. (As a bonus, her acne is starting to clear up as well.)
That's just one small example of something I can do, for myself. I believe if we all resisted the conditioning and stereotypes on a personal level, change would happen on a larger scale.
L
Edit to add: I've been dating someone for almost four years and he isn't the least bit bothered by my non-makeup wearing. In fact, he prefers it.