It had been virtually shattered by two inventions, which were, ironically enough, of purely human origin and owed nothing to the Overlords. The first was a completely reliable oral contraceptive: the second was an equally infallible method--as certain as fingerprinting, and based on a very detailed analysis of the blood--of identifying the father of any child. The effect of these two inventions upon human society could only be described as devastating, and they had swept away the last remnants of the Puritan aberration.