and more from Kant...Fundamental Principles of the Metaphysic of Morals

These issues are discussed in many ways in Philosophy, but a common thread seems to be that it can be shown to be ultimately 'impractical' to allow 'anything'. Fair, decent behavior is, simply, a reasonable way to operate.

Mammy Yokum, Li'l Abner's mom, used to say "Good is better'n evil, 'cause it's nicer!"