They also made use of decadence theory in their article Capitalism Must Go!, in which they explained overproduction, coupled with a rise in unemployment and a reduction in demand, to be the key reason for the Great Depression. The outbreak of the Spanish Revolution was welcomed by the APCF, not only a key challenge to the rise of fascism, but one which had also caused a resurgence in the activities of the previously declining British anti-parliamentary communist movement. Spanish Civil War Although the APCF had previously criticised the reformist tendencies displayed by the Spanish labour movement with the Popular Front victory in 1936 Spanish general election, they declared that the reforms brought by the new government were due to the popular movement that had elected the government to power in the first place, describing the Popular Front as a "capitalist administration" and calling for system change rather than mere regime change. But their views on the Popular Front government changed in the wake of the nationalist coup. They had initially analyzed the coup through an anti-parliamentary lens, commenting that: "The uselessness of parliament should be obvious to all [...] wherever the ruling class decides that parliament fails to express their desires, parliament will be abolished!" But they swiftly took on a notably constitutionalist approach towards the nascent civil war by focusing on the nationalists' breaking of "international law" and describing the Popular Front as an "orthodox democratic government". These terms were used in an attempt to coax intervention from the United Kingdom and France into the war, with the APCF criticising the British government for refusing to provide aid to the Spanish Republic and for placing an arms embargo on the "legally and democratically constituted government of Spain". Months after leaders of the CNT joined the Republican government under Francisco Largo Caballero, the APCF published a pamphlet by the anarchist Minister of Health Federica Montseny which defended anarchist collaboration with the republicans, under the cause of the "unity of all anti-fascists". The initial unity of various differing factions under the Republican banner was a source of inspiration to the APCF, who urged the formation of a similar united front in Britain. The Federation even went as far as to suspend its journal, instead collaborating with the Freedom newspaper on a joint monthly publication Fighting Call. Despite the APCF's call for unity, its relations with the USM remained hostile, with the