Happiness is an electrifying and elusive state. Philosophers, theologians, psychologists, and even economists have long sought to define it. And since the 1990s, a whole branch of psychology—positive ...

Narrator: At dawn on the morning of 14th October 1066, William, his papal banner raised, and wearing the very relics round his neck which he claimed Harold had sworn on, marched his army just over 10 ...