Brexit vs the world: Is Britain too self-obsessed?

As the Brexit process treads water, we've decided to stand back and ask: does Brexit matter in the big scheme of things? Is it virtually irrelevant beside the forces that are shaping our changing world? Gary chats to Peter Frankopan, Oxford professor of global history and author of the best-selling The Silk Roads and The New Silk Roads.   Subscribe to Politics: Where Next? for new episodes every Friday.   Producer: Sarah Gough