What was Keynes's most fundamental idea? The Introduction gives an overview of one of the most well-known economic thinkers of the twentieth century by looking at what others thought of his ideas and the man himself. Keynes stated that we cannot predict the future. He made economics his life's work. He brought a combination of gifts to the subject. He was an extremely intuitive economist. He championed the cause for better statistics, not to provide material but for the intuition of the economist to play on. His favoured objects of contemplation were economic facts.