1898-1956. German dramatist and poet, who aimed to destroy the `suspension of disbelief' usual in the theatre and to express Marxist ideas. He adapted John Gay's Beggar's Opera as Die Dreigroschenoper/The Threepenny Opera 1928, set to music by Kurt Weill. Later plays include Mutter Courage/Mother Courage 194l, set during the Thirty Years' War, and Der kaukasische Kreidekreis/The Caucasian Chalk Circle 1949. As an anti-Nazi, he left Germany in 1933 for Scandinavia and the US. He became an Austrian citizen after World War II; in 1949 he established the Berliner Ensemble theatre group in East Germany.