That's a lovely thought, but I don't think it's based in reality. Change, by it's nature, is disruptive, painful, sometimes unbearable. Human nature is to avoid pain. In all of human history, I'm not aware that the human race has ever collectively, proactively changed it's behavour in the way you describe, and I see no evidence that we'll suddenly start now. Ultimately the changes will happen, but they will happen in the same way they have always happened: mother nature will compel us to change by making us suffer.