Earlier this month the Nobel Prize in Economics was awarded to Thomas J. Sargent and Christopher A. Sims. Sargent, Professor of Economics at New York University, was cited by the Nobel committee for his work on "how structural macroeconometrics can be used to analyze permanent changes in economic policy." To learn more about Sargent, we invite you to read a free chapter from the recent book The Mangle in Practice: Science, Society, and Becoming, edited by Andrew Pickering and Keith Guzik. The chapter is called "Resisting and Accomodating Thomas Sargent," by Esther-Mirjam Sent. Sent argues that "Thomas Sargent was faced with the emergence of different interpretations of rational expectations in different periods as a result of the dance of human and disciplinary agency."