This book is the seventh volume in this series which explores the life of Nobel Price-winning economist F.A. Hayek (1899-1992). The volume uses archival material, juxtaposed with Hayek's published work to challenge the existing perceptions of his life and thought. It examines the methods by which Hayek interacted with – and schemed against – the knowledge communities that he encountered during his very long life. Chapters explore the 'rules of engagement' that Hayek employed when interacting with fifth leading knowledge communities, including the Nobel Prize selection committee who were led to believe his claim about having predicted the Great Depression. It also explores his interactions with William Beveridge, the founder of the modern British Welfare State, A. C. Pigou, the founder of the market school, J. M. Keynes, Sir Arthur Lewis, and Abba Lerner.