Pre-socratic philosopher lived in Miletus, Ionia. Belongs to the Milesian school. Pupil of Thales. Became master of that school. Anaximenes and possibly Pythagoras were his pupils. He was the first great western mind to have written down his ideas.
Anaximander believed that nature was ruled by laws that could be observed and verified by observation and logic. He looked for a universal principle, a cosmic order. Living things emerged from the sea and progressed to dry land. He believed that were many worlds co-existing simultaneously, alternating between creation and destruction.