Bertolt Brecht was a German playwright and theatre practitioner active from the 1920s-1950s. Some key points about his life and work include: he was introduced to Marxist ideas in the 1920s which influenced his plays; he fled Nazi Germany in 1933 and spent years in exile, completing many major plays; his plays used techniques like verfremdungseffekt (alienation effect) to distance audiences and encourage critical thinking rather than emotional response; he founded the Berliner Ensemble in 1949 and established epic theatre as the leading form in post-war Europe.