Chapitre d'ouvrage: This text is to appear in a volume produced at the occasion of the 100th anniversary of Léon Walras death. The first part (introduction) answers one initial demand (to the solicited authors), i.e the evaluation of Walras influence on their own research and more generally on contemporary research. The second part "Between the Capitol Hill and the Tarpeian Rock?" goes further into the discussion of the contemporary status of the intellectual schemes inherited from the development of the walrasian program. The third part argues that part of the questions raised by Walras, f.e those concerning the mechanics of price adjustments, have not yet received satisfactory answers. It then argued that a post-walrasian program, with a strong focus on the explanation of market expectations, is on the agenda.