Ladislav Hejdánek was a Czech philosopher and a proponent of Charter 77. He was born in Prague and graduated from the Charles University in Prague. In 1952 he attained a degree in philosophy with his dissertation "Truth and its ontological premises". From 1956 to 1968 he worked at the Prague Institute of Epidemiology and Microbiology. Then he took a position at the Institute for Philosophy of the Czechoslovak Academy of Sciences, but was expelled in 1971.
