Free Thinking: The importance of networks; the art of dance.

Niall Ferguson talks to Philip Dodd about a less hierarchical history. Jane Munro looks at Degas's depictions of the human body. Sarah Lamb describes dancing MacMillan's ballets.

The Square and the Tower: Networks, hierarchies and the struggle for global power by Niall Ferguson is out now. Degas - A Passion for Perfection runs at the Fitzwilliam Museum in Cambridge until January 14th 2018. Jane Munro has edited a catalogue containing essays to mark the centenary of Degas's death which is published by Yale University Press.

Kenneth MacMillan - A National Celebration - featuring 6 ballet companies from across Britain - takes place at the Royal Opera House between October 18th and November 1st.

Producer: Robyn Read