We have been searching from the earliest days of human history: sometimes for food, a mate, even meaning. This did not change with the emergence of the Internet: since then, digital systems such as Delivery Hero, Friendscout and Google have satisfied the needs of countless seekers. But from the dawn of time, also, human beings have held back from searching until confronted with a pressing concern: hunger, mental/physical loneliness or a precipitous and niggling thirst for knowledge. And from the earliest days, human beings have responded to the results of their quests: unpalatable food, unsuitable partners and useless information almost instantaneously transform a positive mood into an icy demeanour. Unacceptable results cost energy, time and valuable resources!