Lewis Dartnell, Gaia Vince and David Farrier join Rana Mitter to look at deep ecology.
Gaia Vince is the author of Transendence: How Humans Evolved Through Fire, Language, Beauty And Time Lewis Dartnell's book is called Origins: How the earth shaped history David Farrier has written a book called In Search of Future Fossils.
You can find a Free Thinking programme exploring rivers and geopolitics https://www.bbc.co.uk/programmes/m00051hb Matthew Sweet talks to animal expert Jane Goodall https://www.bbc.co.uk/programmes/m00066qd The influential writing of Arne Naess is discussed at in the middle of this programme after a conversation about the Thames estuary https://www.bbc.co.uk/programmes/b07tzydt
Producers: Luke Mulhall and Alex Mansfield