I think it was Gandhi who said, be the change you want to see. So the basis of your story is true about causing the change by changing
I think we must start from ourselves and we musn't do bad things to another people.The empathy is the golden key for living in a better world.
By spreading universal brotherhood. And they say charity begins at home, so have a brotherly feeling for every body, dont expect others to be brotherly towards you, you should be brotherly towards others. Setting an example is the best way to teach.
Michael Jackson said in one of his songs: "If you want to make the world a better place, take a look at yourself and then make a change." So true...
A better you could include something as simple as a smile. You would be very surprised at how contagious a smile can be, it feels good too.