[2] in 1937 he resigned from the priesthood and became a member of the Polish Socialist Party as well as its vice chairman,[3] he was active in socialist circles and in the Society of the Workers' University, he was the editor of "Chłopska Prawda" and the chairman of the district committee of PPS Targówek.

During World War II he stayed in the Soviet Union, from 1939 to 1943 he taught Latin and Greek at the Medical Institute in Donbas, in 1943–1944 an officer in the 1st Polish Army.

He was a vocal speaker for the merger of the PPS with the Polish Workers' Party on terms dictated by the communists.

Considered an influential figure among the Natolin faction during the struggle for power in the leadership of the Polish United Workers' Party in the 1950s.

In the years 1945–1953, he was the chairman of the Main Board of the later the League of Friends of the Soldier (Polish: Liga Przyjaciół Żołnierza).