The article explores the history of economic thought as an intellectual discipline. It discusses different methodologies used in studying this field and highlights key figures like Marshall, Cannan, Hayek, McCulloch, and Samuelson. The researchers delve into classical economics, Marshall's correspondence, Hayek's union of law and economics, and Samuelson's role as both theorist and historian. The findings shed light on the evolution of economic theories and the impact of influential economists on the discipline.