 Marx was politically active throughout his adult life, although the events of 1848—during which time he returned to Paris and Cologne—inspired the first of two periods of especially intense activity. Two important texts here are The Communist Manifesto (1848) which Marx and Engels published just before the February Revolution, and, following his move to London, The Class Struggles in France (1850) in which Marx examined the subsequent failure of 1848 in France. Between these two dates, Marx commented on, and intervened in, the revolution in Germany through the Neue Rheinische Zeitung (1848–49), the paper he helped to establish and edit in Cologne.