Blood and Roses was a trading game, along the lines of Monopoly. The Blood side played with human atrocities for the counters, atrocities on a large scale: individual rapes and murders didn't count, there had to have been a large number of people wiped out. Massacres, genocides, that sort of thing. The Roses side played with human achievements. Arworks, scientific breakthroughs, stellar works of architecture, helpful inventions. Monuments to the soul's magnificence, they were called in the game. There were sidebar buttons, so that if you didn't know what Crime and Punishment was, or the Theory of Relativity, or the Trail of Tears, or Madame Bovary, or the Hundred Years' War, or The Flight into Egype, you could double-click and get an illustrated rundown, in two choices: R for children, PON for Profanity, Obscenity, and Nudity. That was the thing about history, said Crake: it had lots of all three.

You rolled the virtual dice and either a Rose or a Blood item would pop up. If it was a Blood item, the Rose player had a chance to stop the atrocity from happening, but he had to put up a Rose item in exchange. The atrocity would then vanish from history, or at least the history recorded on the screen. The Blood player could acquire a Rose item, but only by handing over an atrocity, thus leaving himself with less ammunition and the Rose player with more...

The exchange rates -- one Mona Lisa equalled Bergen-Belsen, one Armenian genocide equalled the Ninth Symphony plus three Great Pyramids -- were suggested, but there was room for haggling. It was a wicked game.