Tim Lenton is Professor and Chair in Earth System Science and Climate Change at the University of Exeter and Director of the new Global Systems Institute. Since joining the University in 2011, his primary research focus has been on the coupled evolution of life and the planet, on climate change tipping points and early warning methods, and on developing and evolutionary ecosystem model focusing on the marine microbial biosphere. He is particularly interested in how life has reshaped the planet in the past, and what lessons we can draw from this as we proceed to reshape the planet now. These topics are covered in his books, ‘Earth System Science: A Very Short Introduction’ (OUP 2016) and with Andrew Watson, ‘Revolutions that made the Earth’ (OUP, 2011).