Joseph Henry Woodger (2 May 1894 – 8 March 1981) was a British theoretical biologist and philosopher of biology whose attempts to make biological sciences more rigorous and empirical was significantly influential to the philosophy of biology in the twentieth century. Karl Popper, the prominent philosopher of science, claimed "Woodger... influenced and stimulated the evolution of the philosophy of science in Britain and in the United States as hardly anybody else".[1]