Following merchants, explorers, pirates, cartographers and travellers in their quests for spices, gold, ivory, slaves, lands for settlement and knowledge of what lay beyond, David Abulafia has created an extraordinary narrative of humanity and the oceans. Besides its grand narratives, The Boundless Sea explores the lesser known maritime enterprises of Denmark, Sweden, Oman, Sri Vijaya and many others. And today, as plastic refuse covers thousands of square miles of the waters, and once exotic trading cities and outposts are replaced by vast, mechanized container ports, he asks—what next for our oceans and our world?