The next (20) part of the Cooperative Thought Library reminds already forgotten theorist and a pioneer of Polish rural cooperative, a precursor of science management organizations - professor Tadeusz Klapkowski (1902-1984). His relations with institutions very important for the development of indigenous social and economic thought of the period before World War II, such as the Cooperative Institute for Research and the National Agricultural Research Institute in Pulawy are mentioned. Klapkowski is shown as a supporter of the autonomy of cooperatives to the state. The state should play a subservient role to the community initiatives. The excerpts from his book titled 'Cooperatives in Polish agriculture', Warsaw 1929 are reminded.