Although the single most important aspect of Keynes the economist was his policy orientation, his most important work, The General Theory, in spite of its policy overtones, is essentially a theoretical book whose major audience was to be found among professional economists. Keynes wrote, “This book is chiefly addressed to my fellow economists. I hope it will be intelligible to others. But its main purpose is to deal with difficult questions of theory, and only in the second place with the application of this theory to practice.