of the 1970s that led to the creation of Solidarity and provided a philosophical underpinning for the movement. According to Kołakowski, a proletarian revolution has never occurred anywhere, as the October Revolution in Russia had nothing to do with Marxism in his view because it was achieved under the "Peace, Land and Bread" slogan. For Kołakowski, Solidarity was "perhaps closest to the working class revolution" that Karl Marx had predicted in the mid-1800s, involving "the revolutionary movement of industrial workers (very strongly supported by the intelligentsia) against the exploiters, that is to say, the state. And this solitary example of a working class revolution (if even this may be counted) was directed against a socialist state, and carried out under the sign of the cross, with the blessing of the Pope." Influence abroad The survival of Solidarity was an unprecedented event not only in Poland, a satellite state of the USSR ruled in practice by a one-party Communist state, but the whole of the Eastern bloc. It meant a break in the hard-line stance of the Communist Polish United Workers' Party, which had bloodily ended a 1970 protest with machine-gun fire (killing over thirty and injuring over 1,000), and the broader Soviet Communist government in the Eastern Bloc, which had quelled both the 1956 Hungarian Uprising and the 1968 Prague Spring with Soviet-led invasions. Solidarity's influence led to the intensification and spread of anti-Communist ideals and movements throughout the countries of the Eastern Bloc, weakening their Communist governments. As a result of the Round Table Agreement between the Polish government and the Solidarity-led opposition, elections were held in Poland on 4 June 1989, in which the opposition was allowed to field candidates against the Communist party—the first free elections in any Soviet bloc country. A new upper chamber (the Senate) was created in the Polish parliament and all of its 100 seats were contestable in the election, as well as one-third of the seats in the more important lower chamber (the Sejm). Solidarity won 99 of the 100 Senate seats and all 161 contestable seats in the Sejm—a victory that also triggered a chain reaction across the Soviet Union's satellite states, leading to almost entirely peaceful anti-Communist revolutions in Central and Eastern Europe known as the Revolutions of 1989 (Jesień Ludów or Wiosna Obywatelów), which ended in the overthrow of each Moscow-imposed regime, and ultimately to the dissolution of the