Of course the emergence of a revolutionary threat to capital on the left was a key condition for the rise of Fascism in both Germany and Italy—as too in Spain, though not in Romania or Japan—triggering at once a force of counter-revolutionary violence against it from below, and an accommodation, intending cooption, of this force by the established elites of land and money from above, for the common purpose of crushing labour. This was an objective dynamic, for which it is absurd to blame the newly born KPD or PCd’I, as if they should have decided not to exist. On the other hand, contra Winkler, Social Democracy bore a prior, subjective responsibility for the rise of Fascism, at least in Germany, first by rallying to the inter-imperialist war of 1914, without which Nazism would never have become a significant force, and then by ensuring that the forces of old-regime reaction—the army, the Junkers, the Krupps and Thyssens—were preserved intact in 1918–19, indeed welcomed as allies in putting down the revolutionary left. That was avoidable, as Fascist hatred of Communism was not. The Age of Catastrophe praises the SPD as a force for national unity while condemning every attempt at mass mobilization from below as an irresponsible putsch. Yet on Winkler’s own telling, Ebert’s readiness to resort to counter-revolutionary violence not only prompted the left-wing USPD to resign from his provisional government, but also ‘opened up an unbridgeable chasm between the moderate and the radical elements in the German workers’ movement’ once Noske crushed the Spartacist revolt.