How can you be so sure?
Oh come come. Are you being serious? So that means all we have to do is be morally right and eventually all will be well with the world? What about the dramatic downturn in women's rights and human rights in Iran? What about how things are going for gay rights in Russia?
As serious as cancer.
In civilized society that's how it has been successful.
That's why we have gay football players, female CEOs and a black president.
You change attitudes with ideas.