H. G. Wells’s The War That Will End War, written shortly after the outbreak of World War I, analyzes the causes and implications of the conflict while framing it as a fight to defend the ideals of civilization against German militaristic imperialism, justifying Britain’s involvement due to the invasions of Belgium and Luxembourg, and insisting that the war must become a catalyst for ending military imperialism and establishing lasting peace, urging nations to disarm and build a new global order based on cooperation and solidarity, ultimately portraying the war as a pivotal moment for civilization to reclaim justice and the true values of freedom.