History of Slovene literature began in the 16th century with Primož Trubar and other Protestant Reformers. Poetry in Slovene achieved its highest level with the Romantic poet France Prešeren (1800–1849). In the 20th century, the Slovene literary fiction went through several periods: the beginning of the century was marked by the authors of the Slovene Modernism, with the most influential Slovene writer and playwright, Ivan Cankar; it was then followed by expressionism (Srečko Kosovel), avantgardism (Anton Podbevšek, Ferdo Delak) and social realism (Ciril Kosmač, Prežihov Voranc) before World War II, the poetry of resistance and revolution (Karel Destovnik Kajuh, Matej Bor) during the war, and intimism (Poems of the Four, 1953), post-war modernism (Edvard Kocbek), and existentialism (Dane Zajc) after the war.