Senior FT trade writer Alan Beattie on the forces behind the surge and collapse of globalisation, from the Roman and Mongol empires to Donald Trump and Covid-19.

► To learn more, visit our website - https://tradesecrets.ft.com/
► Watch more videos from this series here - https://bit.ly/2ZiDSqM
► Subscribe to our channel - http://bit.ly/2POLnkE
► Check out our Community tab for more stories on the economy.
► Listen to our podcasts: https://www.ft.com/podcasts
► Follow us on Instagram:   / financialtimes'