Just listened to a story. It had the following lines:
His daughter had once asked him why people should clean up messes they did not make.
He told her, “Because the world gets better when someone chooses to.”
(I usually pick up a dozen or more pieces of rubbish to and from the park when I do my endurance workouts so this really struck home with me as it perfectly mirrors my take on the subject.)
And if you want the basic philosophical principle, check out www.bringorder.info )