Complexity: The Emerging Science at the Edge of Order and Chaos

by M. Mitchell Waldrop

untidy forces sometimes push a system slightly out of equilibrium, then they feel the whole trick is to push it back again. Lewontin called these scientists “Platonists,” after the renowned Athenian philosopher who declared that the messy, imperfect objects we see around us are merely the reflections of perfect “archetypes.” Scientists of the second type, however, see the world as a process of flow and change, with the same material constantly going around and around in endless combinations. Lewontin called these scientists “Heraclitians,” after the Ionian philosopher who passionately and poetically argued that the world is in a constant state of flux. Heraclitus, who lived nearly a century before Plato, is famous for observing that “Upon those who step into the same rivers flow other and yet other waters,” a statement that Plato himself paraphrased as “You can never step into the same river twice.”