Avicenna revolutionizes metaphysics with groundbreaking ideas about necessity and contingency, and his new distinction between essence and existence.

HoP 140 - By All Means Necessary - Avicenna on God

Peter Adamson, Professor of Philosophy at the LMU in Munich and at King's College London, takes listeners through the history of philosophy, "without any gaps". www.historyofphilosophy.net