The ancient Greek philosopher Epicurus believed there were just three simple things we needed in order to be happy - and money wasn't one of them.
Alain reveals what those things were, in a journey that takes him to the ruins of the ancient city of Oinoanda in south-western Turkey.
The answers he finds there help him to look at consumer society through Epicurus' eyes and he discusses the philosopher's beliefs with unhappy shopaholic Stephen Perry.
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Ready to Watch Philosophy A Guide to Happiness, Season 1, Episode 2?