One man named Keynes devoted his life to economics. He lived from 1883 to 1946 and is known as the father of macroeconmics. He is best remembered as writing "The General Theory" which was published in 1936. There is a model named after him and the model is based on the aggregate demand. It basically tells you that the aggregate demand will have full employment, but prices and wages will not be change. Sometimes John Keynes would like to read and write in the orchard after lunch when he was in Britian. In 1919 Keynes was the British advisior when the peace treaty was negociated. For more Information on John Keynes check your local library or "Economics for Today" by Irvin Tucker