Career
An official at a coal mine, he was put forward by Wojciech Korfanty to take over the management of the Organization Division of the Polish Plebiscite Commission in Beuthen. When Kupka became aware of its secret activities, Korfanty demanded that he change the direction and methods of plebiscite agitation. Afraid of a break, Korfanty expelled Kupka from the Commission.
Along with Kupka left other Silesian officials such as Cysarz, Zmuda, Gemander, Szymura, Pietruszka.
This diminished Korfanty"s support. In September 1920 Theofil Kupka founded the Upper Silesian Plebiscite Committee (Das Oberschlesische Plebiszit-Komitee) in Beuthen.
Initially this committee aimed for "free-state autonomy" (independence) of Upper Silesia and opposed the "corruption" of the Polish Plebiscite Commission. Soon Theofil Kupka recognized that independence for Upper Silesia was unrealistic and therefore broke his cooperation with the Union of Upper Silesians and made contact with Kurt Urbanek, the German plebiscite commissioner.
Afterwards, in November 1920, Kupka edited the first edition of the bilingual weekly „Wola Ludu – Der Wille des Volkes” (The Will of the People).