Venizelism (Βενιζελισμός) was one of the major political movements in Greece from the 1900s until the mid-1970s.
Named after Eleftherios Venizelos, the key characteristics of Venizelism were:
Greek irredentism: The support of the Megali Idea.
Greek nationalism (liberal nationalism)
Liberal democracy: Venizelists represented upcoming urban classes that were against the old conservative establishment, which also had close ties with the palace.
Pro-Western: Alliance with the Entente against the Central Powers during WWI, and with the Allies during WWII. Also pro-Western during the Cold War, but later diverged with direct confrontation between Greek nationalist forces in Cyprus against British colonial forces.
Republicanism: Despite Venizelos' moderation regarding the monarchy, most of his supporters were in favour of a Republic, on the French standards.
Mixed economic policies: from economically liberal to social democratic policies.
Anti-Bolshevism': Venizelos rejected the bolshevik system and was the main introducer of the Idionymon anticommunist law in 1929. In a speech he had delivered in the Greek parliament he had stated that socialism is democratic and Bolshevism authoritarian.
In the contemporary sense the ideology incorporates national liberalism, civic nationalism, economic liberalism, liberal democracy, pro-Europeanism, republicanism, secularism, centrism, radical centrism and generally moves from centre-right to social democracy.
Venizelos' liberal party ruled Greece from 1910 until 1916. That year, determined to enter World War I on the entente side, Venizelos rebelled against the king and formed a Provisional Government of National Defence in Thessaloniki. Venizelos regained full control of the country in 1917 and ruled until losing the 1920 elections. The strongest support for Venizelism came in the "New Greece" gained after the Balkan Wars of 1912–1913 consisting of Crete, Thrace, Epirus, the North Aegean islands, and Macedonia. By contrast, people in "Old Greece" tended to be more much royalist.