"True indeed, sir," Beau pressed, cooler and keener for the attack on his Greater South. "Most of us enter the Change World with the false metaphysic that the slightest change in the past — a grain of dust misplaced — will transform the whole future. It is a long while before we accept with our minds as well as our intellects the law of the Conservation of Reality: that when the past is changed, the future changes barely enough to adjust, barely enough to admit the new data. The Change Winds meet maximum resistance always. Otherwise the first operation in Babylonia would have wiped out New Orleans, Sheffield, Stuttgart, and Maud Davies' birthplace on Ganymede!

"Note how the gap left by Rome's collapse was filled by the imperialistic and Christianized Germans. Only an expert Demon historian can tell the difference in most ages between the former Latin and the present Gothic Catholic Church. As you yourself, sir, said of Greece, it is as if an old melody were shifted into a slightly different key. In the wake of a Big Change, cultures and individuals are transposed, it's true, yet in the main they continue much as they were, except for the usual scattering of unfortunate but statistically meaningless accidents."

"All right, you bloody savants — maybe I pushed my point too far," Bruce growled. "But if you want variety, give a thought to the rotten methods we use In our wonderful Change War. Poisoning Churchill and Cleopatra. Kidnapping Einstein when he's a baby."

"The Snakes did it first," I reminded him.

"Yes, and we copied them. How resourceful does that make us?" he retorted arguing like a woman. "If we need Einstein, why don't we Resurrect him, deal with him as a man?"