The pre-Socratic philsophers were concerned primarily with the constitution of nature and the principles that account for change and development. Try to classify the pre-Socratic philsophers according to their positions concerning the original and elementary constituents of nature, the differentiation (or appearance of differentiation) among various entities and finally the principles that account for change (or the appearance of change) in those objects, including changes in the dispositions and behaviors of human beings.
