I know the evil of my ancestors because I am those people. The balance is delicate in the extreme. I know that few of you who read my words have ever thought about your ancestors this way. It has not occurred to you that your ancestors were survivors and that the survival itself sometimes involved savage decisions, a kind of wanton brutality which civilized humankind works very hard to suppress. What price will you pay for that suppression? Will you accept your own extinction?
Attributed to: Leto Atreides II
From Chapter 15 of God Emperor of Dune by Herbert, Frank