Speakers: David Abulafia, Sam Leith

For most of human history, the seas and oceans have been the main means of long-distance communication between peoples. To this day 90% of global trade is conducted this way and it has been pivotal to the spread of ideas and religion since the Polynesians in the first century. Historian David Abulafia joins us with The Boundless Sea, a book of the year in the Sunday Times and Financial Times and winner of the Wolfson History Prize, charting our relationship with the bodies of water that surround us. In conversation with journalist and author Sam Leith