They distributed information to Catholics throughout Poland via publications in Tygodnik Powszechny (The Universal Weekly) and the monthly Znak (The Sign).
[1] In the early 1980s, the Krakow branch began working with the Solidarity movement and created a network smaller clubs throughout the country.
Between 1981 and 1983, when martial law in Poland was imposed, the KIK participated in underground activities to support Solidarity activists.
[1] Their overriding goals in the 1980s were to try to improve church-state relationships, end government censorship and promote economic reforms.
[2] In 1989, the KIK founded a Civic Committee (Komitet Obywatelski) which worked to select the leadership of independent Poland.