One fact that does seem clear, however, is that the ability to make order out of chaos is not unique to psychological processes. In fact, according to some views of evolution, complex life forms depend for their existence on a capacity to extract energy out of entropy—to recycle waste into structured order. The Nobel prize–winning chemist Ilya Prigogine calls physical systems that harness energy which otherwise would be dispersed and lost in random motion “dissipative structures.” For example, the entire vegetable kingdom on our planet is a huge dissipative structure because it feeds on light, which normally would be a useless by-product of the sun’s combustion. Plants have found a way to transform this wasted energy into the building blocks out of which leaves, flowers, fruit, bark, and timber are fashioned. And because without plants there would be no animals, all life on earth is ultimately made possible by dissipative structures that capture chaos and shape it into a more complex order.