Have faith in your values. Don't expect people to disagree. True ideas win arguments. True ideas win converts. True ideas get popular. Good values reward you. Bad values "reward" their holders (no need to do anything to them).
And as to "rewarding" holders of bad values -- it's a form of imposing one's values, and thus needs a non-arbitrary, non-reversible justification.
To explain "Don't expect people to disagree" this comes up a lot with parenting. Like people will ask "What if my child wants to commit murder?" Well, why the fuck would he want to do that? You're right that murder is wrong, aren't you? Yes, you are, so why expect child to disagree..? Comes up with the pro-death people too, who think it'd be wrong to waste extra life watching TV, but expect people to do it...