In this remarkable journey, Planet Food travels the world to see how control of the spice trails, over the last five millennia, has made great cities and destroyed ancient civilizations. Our guides travel from the Molucca Islands of Indonesia, the original home of cloves and nutmeg, to the Indian province of Kerala, with its native pepper and cardamom. Additional stops include Venice, Beirut, Cairo and other significant places in the spice trade that created and toppled empires.

• Documentary