The analysis is based on interviews with four leaders of the Solidarity Trade Union (Lech Wałęsa, Marian Krzaklewski, Janusz Śniadek and Piotr Duda) with the simultaneous use of extensive research achievements on the trade union movement, also co-created by the author, The basic hypotheses that were examined concern the rooting of "Solidarity" "In the popular Catholic tradition and anti-communism, which, according to the author, significantly influenced the process of the evolution of" Solidarity "as a social movement and was / is an obstacle in its functioning as a trade union. The book's empirical material is unique, and the possibility of comparing the opinions and interpretations of various events related to the history and the present of the Association, presented by the interviewees, gives the book a unique character.