The period between the two World Wars (1919-1939) indeed posed a grave challenge to the nascent and established democratic state systems, largely due to a confluence of economic, political, and ideological factors.

Economically, the devastating Great Depression (1929) shattered faith in liberal capitalism and parliamentary democracy. Widespread unemployment, poverty, and social unrest made democratic governments appear ineffective and indecisive in tackling national crises. This fertile ground allowed radical ideologies to promise quick solutions.

Politically and Ideologically, this era saw the virulent rise of totalitarian regimes. In Italy, Mussolini's Fascism (from 1922) rejected parliamentary democracy in favour of a single-party, authoritarian state emphasizing national unity and state control. Germany witnessed the meteoric ascent of Nazism under Hitler (from 1933), which combined extreme nationalism, racial ideology, and militarism to dismantle democratic institutions, brutally suppressing dissent. Similarly, Stalin's totalitarian communism in the Soviet Union consolidated power through purges and state control, offering an alternative to Western liberal models.

These dictatorships actively propagated anti-democratic narratives, glorifying charismatic leadership, unquestioning obedience, and the supremacy of the state over individual rights. They exploited public disillusionment with post-WWI settlements and economic hardships, presenting themselves as strong, decisive alternatives to democratic inefficiency. This stark ideological clash fundamentally challenged the universality and viability of democratic governance, setting the stage for the Second World War.