The various varieties of pacifism had little impact on the war itself, though rather more on the politics of the two decades that followed. This chapter covers pacifism in three senses during the Great War: the absolute rejection of military force, the progressive belief that political reforms could ultimately abolish war, and simple war-aversion. It offers cursory treatment of the third, which is a matter of morale. As an ideology that could shape war aims and peace terms in and after 1914, the reformist version of pacifism existed on a broader geographical base than its absolutist counterpart. The anti-war agenda had become even more apparent by the time a major wave of strikes erupted across Germany in January 1918. The anti-war pacifism of material grievance had the greatest short-term impact, especially in countries too illiberal to allow an authentic peace movement to flourish even as a safety valve.