[1][2] Together with Tone Seliškar, he is considered as the foremost representative of Slovene social realist poetry of the 1930s and 1940s.
At the outbreak of World War I, the family moved to the industrial town of Zagorje ob Savi.
During World War II, he joined the partisan resistance, and became the chairman of the Commission for Culture in the Slovenian National Liberation Council (SNOS).
Among other, he translated works of Heinrich Heine, Pushkin, Lermontov and Korney Chukovsky into Slovene.
Klopčič is most renowned for his pre-World War II poetry, consisting of dry yet highly descriptions of the daily life of minors and industrial workers.