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Becky Ripley and Sophie Ward take a cold hard look at the psychology behind each of the seven deadly sins, in the order established by Pope Gregory the Great: pride, greed, lust, envy, gluttony, wrath, and lazy old sloth. Why have we evolved these ugly emotions? What’s going on in the brain and the body when we feel them? And how best can we live alongside them - in ourselves and with others?

Greed is in the spotlight today. And we're not talking food. (That’s gluttony, we come to that later in the series.) We're talking greed for money, for land, for material things – and ultimately for control, status, dominance, power. The kind of greed that separates the "haves" from the "have nots".

On one hand, greed is a great motivator, driving us all forward in our pursuit to get more of whatever it is we want. But at its ugliest, greed can come at a huge cost to other people, and to the planet. When does self-interested behaviour become selfish? And can we be greedy for the good?

To guide us through this mess is evolutionary anthropologist Dr Anna Machin from the Department of Experimental Psychology at the University of Oxford, psychologist and social scientist Professor Paul Piff from the Department of Psychological Science at the University of California, Executive Director of the New Economy Organisers Network, Ayeisha Thomas-Smith, and a few wise words from Sir David Attenborough.

Producer: Becky Ripley