In order to penetrate ever further into their subjects, the host of specialists narrow their field and dig down deeper and deeper till they can't see each other from hole to hole. But the treasures their toil brings to light they place on the ground above. A different kind of specialist should be sitting there, the only one still missing. He would not go down any hole, but would stay on top and piece all the different facts together. -- Thor Heyerdahl, Aku-Aku