Empedocles: The Presocratic Who Jumped Into a Volcano

Empedocles (c. 495–435 BC), a Sicilian polymath from Acragas (modern Agrigento, Sicily), blended science, prophecy, medicine, and philosophy. He proposed that all matter derives from four eternal "roots": earth, air, fire, and water, driven by two opposing forces: Love (Philia) and Strife (Neikos). These forces cyclically unite and separate the roots, creating and destroying the cosmos. His epistemology held that perception occurs when impulses from objects match pores in the body, governed by the principle "like perceives like" (homoion homoio). This same principle extends to cognition and ethics, linking the human soul to the divine Sphairos. Aristotle criticized Empedocles for conflating intellectual thought (noēsis) with sensory perception (aisthēsis) in De Anima, a critique expanded by Theophrastus in De Sensibus. Legend holds that Empedocles died by leaping into Mount Etna to prove his divinity, with only a bronze sandal expelled by the lava.