In the Anatomy of Kindness, a three part documentary series, broadcaster, author and psychologist Claudia Hammond interrogates what it means to be kind, who we are kind to and the benefits of being a kind boss.

For the first of the three programmes Claudia examines our motivations and decision making around kindness. She meets a super altruist who risked his life for a stranger, his motivation, he says, is to make the world a better place. A car accident left neuroscientist Professor Abigail Moore stranded on the outside lane of an American freeway facing the oncoming traffic. In a split second a stranger made the decision to run into the oncoming traffic and save her, without thinking of the danger. This act of heroism shaped Abigail’s research. She looks at such extreme altruists and her work explores the relationship between psychopathy and extraordinary altruism.

Professor of Philanthropy Sara Konrath was surprised to discover that narcissists are just as likely to give to charity as very empathic people, but a remarkable act of empathy was her inspiration to research this topic and we discover what she owes to a very kind person who entered her life at a pivotal time.

But what about the everyday acts of kindness? Can we ever say we do something for someone else without expecting something in return? Psychologist Jo Cutler says that we weigh up the effort to do something for someone else every time we act, even when it’s as simple as holding the door open. Nichola Raihani, Professor of Evolution and Behaviour and author of "The Social Instinct, how cooperation saved the world" thinks we've evolved to be altruistic, it’s the reason why we have been so successful as a species and altruism brings reputational and status benefits. But how cynically do we act when we are kind?

Claudia examines the evidence and decides whether you can ever carry out an act of pure kindness.