Nichola Raihani is a professor of Evolution and Behavior at University College London. She joined me to discuss her new book The Social Instinct. We also spoke about: cooperation from cell to society, what makes us different from the great apes, what we have in common with meerkats, peacocking and why reputation matters, paranoia as a normal function of life, the impact of community on mental health and the idea of self-interested altruism.

You can find Nichola on Twitter: @nicholaraihani