Bertrand Russell, in his History of Western Philosophy, acknowledged that all of philosophy can be said to  have begun with him.
This man is said to have accurately predicted an eclipse of the sun, after which he was acknowledged as one of the seven wise men of Greece. One of his students, Anaximander, believed that all matter was a form of apeiron, or ―the  boundless,‖ he apparently didn‘t differ too much from his teacher, who also believed all matter was composed of one  element. Bertrand Russell, in his History of Western Philosophy, acknowledged that all of philosophy can be said to  have begun with him. FTP, name this Milesian philosopher who thought the world was made of water.
This man is said to have accurately predicted an eclipse of the sun, after which he was acknowledged as one of the seven wise men of Greece.
Thales