In a marvelous book entitled Consilience (Knopf Publication, 1998), Harvard biologist Edward O. Wilson notes scientists' fascination with the unity of the sciences. Modern physicists, for example, have striven for decades to develop a grand unification theory for all of nature's forces-electroweak, strong, and gravitational. Gerald Holton, a science historian, has coined a wonderful phrase to describe this belief in the unity of scientific knowledge-he calls it the Ionian Enchantment. The renowned Ionian philosopher Thales of Miletus is credited with starting the concept around 600 BC, when he put forward his belief that all matter is made up of water. Erroneous as it might have been, Thales' belief is a prime example of his desire to look for unity in nature.