called eudaemonic happiness. ‘It’s kind of striving after a noble goal,’ he told me. ‘So it’s heroic behaviour in a literary sense?’ I said. ‘Right. Exactly,’ he said. Further studies have found that people with a greater sense of purpose, and more likely to agree with statements such as, ‘Some people wander aimlessly through life, but I am not one of them,’ actually lived longer than others, even when factors such as age and well-being were controlled for.

