The First World War lasted for four years and resulted in the deaths of millions. Such a catastrophic event led to the investigation of historians for its causes and origins. Proponent historians of the intentionalist interpretation of the causes of the war have put forward the judgment that `Germany must bear the ultimate reasonability for the outbreak of the First World War'. This essay will evaluate the agreeability of this judgment by looking at Germany's aggressive pursuit for its Weltpolitik foreign policy and also Germany's pre-war will and desire for war to realize its expansionist ambitions. However, the essay will also look at two other factors which led to war, the alliance system and domestic issues within the European powers respectively. It will be argued that the judgment for Germany must bear the ultimate responsibility for WWI is less agreeable when compared to paramount causes such as the...