I first encountered Anaximander in a course I took in Ancient Greek philosophy, and I didn’t have the sense to be impressed. Only four brief lines of his work survive, and to me they were utterly mysterious: All things originate from one another, and vanish into one another according to necessity; they give to each other justice and recompense for injustice in conformity with the order of Time. Rovelli, Carlo. Anaximander (p. 79). Penguin Publishing Group. Kindle Edition. Neither my textbook nor my professor pointed out that these rather mysterious lines contain a profound idea – the notion of natural law, the idea that the phenomena of nature are due not to the whims of this god or that, but the operation in time of natural laws, or necessity. This was a profound innovation. All previous explanations of rain, storms, thunder, lightning and other phenomena seem to have attributed them to the actions of gods and spirits. Anaximander’s idea thus began a ...