One thing Andrzej Wajda wanted to do with his first film, 1955's A Generation, was to include a frank explanation of Marxism to let it stand in marked contrast to what the Soviets were actually running in Poland and hope that it would push a popular revolution. To his surprise the Soviet censors let the scene through. To his horror the revolution did not come. Oops.
We're starting a string of Wajda's first three films, contained in Criterion's Three War Films boxset, and they just get better from here.