Hello everyone! I want to ask some questions... What are the main concern/ objectives of the ionian school of thought? Thales said that the essence of all things is water. Why? Anaximander said that the lump of material that is infinite and eternal called apeiron ("The Unlimited") is the essence of all things. Why? Also, Anaximenes claimed that the world was made of air and not water or the apeiron. Why? Heraclitus said that fire is the essence of all things. Why?