During this period, Voltaire also adopted what would become his most famous and influential intellectual stance, announcing himself as a member of the “party of humanity” and devoting himself toward waging war against the twin hydras of fanaticism and superstition. While the singular defense of Newtonian science had focused Voltaire’s polemical energies in the 1730s and 1740s, after 1750 the program became the defense of philosophie tout court and the defeat of its perceived enemies within the ecclesiastical and aristo-monarchical establishment. In this way, Enlightenment philosophie became associated through Voltaire with the cultural and political program encapsulated in his famous motto, “Écrasez l’infâme!” (“Crush the infamy!”). This entanglement of philosophy with social criticism and reformist political action, a contingent historical outcome of Voltaire’s particular intellectual career, would become his most lasting contribution to the history of philosophy.