1913- . Polish Communist politician. He entered the Politburo of the ruling Polish United Workers' Party (PUWP) in 1956 and was party leader 1970-80. His industrialization programme plunged the country heavily into debt and sparked a series of Solidarity-led strikes. Gierek, a miner's son, lived in France and Belgium for much of the period between 1923 and 1948, becoming a member of the Belgian Resistance. He served as party boss in Silesia during the 1960s. After replacing Gomulka as PUWP leader in Dec 1970, he embarked on an ambitious programme of industrialization. A wave of strikes in Warsaw and Gdansk, spearheaded by the Solidarity free trade-union movement, forced Gierek to resign in Sept 1980.