In our frenzied lives rituals answer our human needs and desires; they teach us how to love, how to let go and where we belong.
Across the globe we perform rituals, from the intimate ceremonies around birth, to great mass pilgrimages in our millions. Rituals can challenge our courage through tough initiations and give us hope through our grief. They have the power to change us completely and connect us to something greater than ourselves.
Read more about the series on the BBC's programmes pages or find out more about the fascinating world of ritual and religion below.