Should we all become Stoics? A new book about an elderly American man offers clues about how to live and be happy in a world which is changing very quickly.
How to be happy by Charlie (aged 109)
Sensational centenarian: Born in Missouri, Charlie White became a medical student in 1925. Glossary
Stoicism - A philosophy that originated in the ancient world and still has many adherents today. Stoics seek to control their emotions and preserve their happiness in the face of adversity.
Envy - Wanting things that others have.