Insofar as the war on cancer used to be fought by surgical strikes, chemical warfare and nuclear bombardment, today’s and tomorrow’s cancer battles are fought through information warfare. The treatment of blood cancers, in particular, has a deep history of using blunt DNA alkylating agents that indiscriminately targeted rapidly proliferating white blood cells, the first of which was mustard gas. Perhaps not surprisingly, many early treatments for blood cancers also had a nasty habit of causing them.