Abstract
The questions that occupied early Ionian philosophers are very general in nature, and are not linked to the various skills and crafts that surface early in Greek civilization. The awe and wonder fuelling these questions were directed towards large scale phenomena, and—according to the interpretation presented in this essay—called for more than mere re-descriptions or re-labellings of various features of reality. They called for explanations, but the notion of an intellectually adequate explanation took a long time to develop. Conceptions of adequate explanation were changing throughout Pre-Socratic philosophy. It was left to Aristotle to attempt to capture the various models, and give them a unifying structure within an explicit theory.