“But do not let us flatter ourselves. Do not let us, in all the pomp and circumstance of stately history, blind ourselves to the fact that the crimes of Frederick, or Napoleon, or their successors, are in essence no different from those of Sheppard or Peace. We must not imagine that the bad man who happens to offend against those particular laws which constitute the criminal code belongs to a peculiar or atavistic type, that he is a man set apart from the rest of his fellow-men by mental or physical peculiarities.”