Povl Heinrich Riis-Knudsen (born 1950) is a prominent Danish Neo-Nazi. Riis-Knudsen is best known as the author of the articles National Socialism: A Left Wing Movement (1984) and National Socialism: The Biological World View (1987).
Riis-Knudsen first came to prominence when Matt Koehl took charge of the World Union of National Socialists (WUNS) and sought out Riis-Knudsen, already a leading neo-Nazi in Denmark, as his European contact. Riis-Knudsen, who felt that Nazism in Europe was hamstrung by the continent's historical experience, welcomed the move as he felt the United States had less of this and so he became General Secretary of the WUNS. At the time he at the head of an expansion for the group with the likes of Gaston-Armand Amaudruz in Switzerland, Ramon Bau in Spain and Victor DeCecco in Italy affiliating. Before long, however, Riis-Knudsen lost this position as he did not then share Koehl's desire to form a religion based on Nazism, claiming that "normal people were few and far between" when he visited Koehl's supporters. Following the breakdown of this relationship, Riis-Knudsen began to concentrate more on writing.
His seminal work was the 1987 article National Socialism - The Biological World View in which he argued that National Socialism had its basis in the laws of nature and was in effect the culmination of the search for truth as the founding principle of life. Much of what he has written is based on the mysticism of Savitri Devi.
He also published National Socialism - A Left Wing Movement (1984), which argued that the revolutionary nature of Nazism set it apart from the reactionary ways of the right and so Nazism was in fact a left wing ideology.