Józef Piłsudski's letter to Feliks Perl
The leftist Polish Socialist Party (Polska Partia Socjalistyczna, PPS) and the nationalistic National Democracy (Narodowa Demokracja) were the two most powerful Polish pro-independence groups established towards the end of the 19th century which continued their political activity in the 20th century. Among the most prominent figures in the first one was Józef Piłsudski (pseudonym “Ziuk”),…