Nathan speaks to Samuel Miller McDonald, Current Affairs contributor and researcher at Oxford's school of geography and environment. Together, they discuss the factors and forces that steer the course of life on Earth. As you might imagine, this results in a very wide-ranging conversation, which covers everything from coal to anarcho-syndicalist peasants to sloths. This is a preview of an episode available in full to our $5 Patreon subscribers. To listen to the whole episode, as well as lots of other brilliant bonus episodes, please consider becoming one of our subscribers at www.patreon.com/CurrentAffairs!