 Nonetheless, some social scientists, such as Zbigniew Brzezinski and Frank Gibney, refer to these changes as a revolution, one less dramatic than its Hungarian counterpart but one which may have had an even more profound impact on the Eastern Bloc.Timothy Garton Ash calls the Polish October the most significant event in the post-war history of Poland until the rise of Solidarity.History professor Iván T. Berend claims that while the effects of the Polish October on the Eastern Bloc may be disputed, it set the course for the eventual fall of communism in the People's Republic of Poland.