“without these rogue bees, the hive would get stuck in what complexity theorists call ‘a local maximum’; they would be so efficient at collecting food from known sources that, once these existing sources of food dried up, they wouldn’t know where to go next and the hive would starve to death. So the rogue bees are, in a sense, the hive’s research and development function, and their inefficiency pays off handsomely when they discover a fresh source of food. It is precisely because they do not concentrate exclusively on short-term efficiency that bees have survived so many million”