Mercenary

Castes tended to perpetuate themselves.

I don't know man's goal, if there is one. I'm not even sure it's important. It's the road that counts. The endeavor. The dream. The effort expended to make a world a better place than it was at the time of your birth.

one person can hold a secret. It's twice as hard for two, and from there on it's a decreasing probability in a geometric ratio.