In the first programme of the New Year Adam Rutherford follows two possible guides to a more fulfilled life – Socrates and optimism – but asks whether either has any answers to dealing with racism.

The philosopher Agnes Callard proposes the questioning Socratic method in Open Socrates: The Case for a Philosophical Life. She shows that this ancient method offers a new ethics to live by, from answering questions about identity and inequality, to helping us love and die well. But to truly flourish we also need a huge dose of optimism, according to the science writer Sumit Paul-Choudhury. In The Bright Side he argues that being optimistic is not only central to the human psyche, but plays a crucial role in overcoming the challenges of the twenty-first century.

The social psychologist Keon West is more sceptical. In his new book The Science of Racism, he challenges those – a reputed half of the population – who think that racism doesn’t exist. He goes back to the data and research to reveal the extent and prevalence of racist behaviour, and the repeated inadequacy of attempts to address it.

Producer: Katy Hickman