Like all new research fields, the "new economic sociology" was produced by the redeployment of relatively diverse researchers under a single academic label. Academic entrepreneurs in the second half of the 1980s took up the traditional term of the European "founding fathers" claiming they were renewing the discipline while distinguishing themselves from (1) the old homegrown denomination "economy and society," (2) anti-disciplinary currents such as neo-Marxism, and (3) interdisciplinary movements like "socioeconomics." The relative unity of the new economic sociology was due more to this set of demarcations than to a specific intellectual approach. The new economic sociology obtained its scientific legitimacy by bringing together two promising new currents: network analysis and neo-institutionalism, along with a more marginal cultural mode of analysis. While there had been very little exchange among these currents, mutual references became more ecumenical once a common label had emerged and distinct intellectual programs were launched. Institutional legitimacy was quickly obtained thanks to the support of the Russell Sage Foundation, enabling a process of expansion that in Europe developed far more slowly. The case of the "new economic sociology" demonstrates that the creation of new subdisciplines cannot be understood merely through the analysis of direct interactions among persons linked to each other by inter-acquaintanceship. In accordance with a field theoretical approach, academic entrepreneurs function under structural conditions which must also be taken into account. Among these structural conditions were changes in the academic field itself (due to demographical effects, the imperialism of economics, and the surge in Business Schools) as well as in the political sphere (the rise of neo-liberalism).