text: After 1945 Stapledon travelled widely on lecture tours. Arthur C. Clarke, as Chairman of the British Interplanetary Society, invited him to give a talk on the social and biological aspects of space exploration. He also travelled internationally, visiting the Netherlands, Sweden and France, and in 1948 he spoke at the World Congress of Intellectuals for Peace in Wrocław, Poland. He attended the Conference for World Peace held in New York City in 1949, the only Briton to be granted a visa to do so. In 1950 he became involved with the anti-apartheid movement. After a week of lectures in Paris, he cancelled a projected trip to Yugoslavia and returned to his home in Caldy, where he died very suddenly of a heart attack.
  Stapledon was cremated at Landican Crematorium. His widow and their children scattered his ashes on the sandy cliffs overlooking the Dee Estuary, a favourite spot of his that features in more than one of his books. Stapledon Wood, on the south-east side of Caldy Hill, is named after him.
  Works
  Stapledon's fiction often presents the strivings of some intelligence that is beaten down by an indifferent universe and its inhabitants who, through no fault of their own, fail to comprehend its lofty yearnings. It is filled with protagonists who are tormented by the conflict between their "higher" and "lower" impulses.
  Stapledon's writings directly influenced Arthur C. Clarke, Brian Aldiss, Stanisław Lem, Bertrand Russell, John Gloag, Naomi Mitchison, C. S. Lewis, Vernor Vinge, John Maynard Smith and indirectly influenced many others, contributing many ideas to the world of science fiction. Clarke wrote: