The 'Middle Stone Age'. See 'The Chronology of the Stone Age'.
Fact of the Day
The earliest book of English table manners was written by Daniel of Beccles in the time of Henry II. It prohibited elbows on tables, talking with full mouths and scratching armpits. It also gave guidance on what to do if the wife of the host were to make a pass at a guest: he should feign illness.