The last post touches on the issue, are our actions determined by our genes or our actions determined by what we taught and believe? A man can be ambitious without killing and conquering anyone.
Not sure if the makers are familiar with Kirk's speech in "TASTE ... ARMAGEDDON" ... y'know, all that 'we're killers but we're not going to kill... today.' Maybe they have superior ambition AND superior willpower, which would offset the ambition or at least keep them from superior bad habits like cracksmoking.