Lutosławski's parents were both born into the Polish landed nobility; they owned estates in the area of Drozdowo. His father Józef was involved in the Polish National Democratic Party (""Endecja""), and the Lutosławski family became intimate with its founder, Roman Dmowski (Witold Lutosławski's middle name was Roman). Józef Lutosławski studied in Zürich, where in 1904 he met and married a fellow student, Maria Olszewska, who later became Lutosławski's mother. Józef pursued his studies in London, where he acted as correspondent for the National-Democratic newspaper, "Goniec". He continued to be involved in National Democracy politics after returning to Warsaw in 1905, and took over the management of the family estates in 1908. Witold Roman Lutosławski, the youngest of three brothers, was born in Warsaw shortly before the outbreak of World War I. In 1915, with Russia at war with Germany, Prussian forces drove towards Warsaw. The Lutosławskis travelled east to Moscow, where Józef remained politically active, organising Polish Legions ready for any action that might liberate Poland (which was divided according to the 1815 Congress of Vienna—Warsaw was part of Tsarist Russia). Dmowski's strategy was for Russia to guarantee security for a new Polish state. However, in 1917, the February Revolution forced the Tsar to abdicate, and the October Revolution started a new Soviet government that made peace with Germany. Józef's activities were now in conflict with the Bolsheviks, who arrested him and his brother Marian. Thus, although fighting stopped on the Eastern Front in 1917, the Lutosławskis were prevented from returning home. The brothers were interned in Butyrskaya prison in central Moscow, where Witold—by then aged five—visited his father. Józef and Marian were executed by a firing squad in September 1918, some days before their scheduled trial.