Emile (1800-75) and Isaac Pereire (1806-80) were pivotal and sensational figures, their lives and careers a lens through which to re-examine the history of France in the nineteenth century. Among the first generation of Jews emancipated by the French Revolution, they became significant Saint-Simonians, contributing to its philosophy of financial and economic reform. They were the first to implement the new rail technology in France and to launch the first investment bank of any size in Europe, the Cre?dit Mobilier. The Pereires ultimately came to stand behind banks and railways throughout Europ