If some people simply stopped thinking that everyone owes them something and that they're never wrong, if they looked in a mirror at themselves, if they quit playing "two face" and deal with their issues, then the world might look brighter for them.
In the book "How to Win Friends and Influence People", Dale Carnegie talks about how to live a great life. It must work - for decades, people have (and continue to) paid thousands of dollars to learn simple techniques to change a person's behavior by FIRST changing their own behavior.
Maybe this book should be a prerequisite to being an adult.
But some people would have to get past their own vanity to face their own demons.