. 384–22 BC. Pupil of PLATO, after whose death he travelled round the Aegean (and was tutor to Alexander the Great), and then founded Lyceum in Athens (355 BC; also called Peripatos; hence ‘Peripatetics’). His interests were encyclopaedic, and he contributed to most of the main branches of philosophy and natural science, as well as initiating the systematic study of logic.