[Protagoras]

"Did I say otherwise? No. Read it again: I said it increases risk."

Nope. Committing such acts greatly increases the risk to yourself and your potential progeny, at no gain.

You stand corrected.

[orionblamblam]

I do indeed. However, for the most part murder (even when gotten away with) provides little to no gain. Go back to the Nazi reference: what did it gain the Nazis to murder the Jews and the Roma? It's easy to see they would have done better to at the worst simply ignore them.