Professor Knight gained his PhD in 1987 for a thesis on Claude Lévi-Strauss's four-volume 'Mythologiques'. He became a lecturer in anthropology at the University of East London in 1989. Knight is a founding member of the "Radical Anthropology Group". He is currently a senior research fellow at University College London.
Since 1966, Knight has been exploring the idea that language and symbolic culture emerged in the human species through a process of Darwinian evolution culminating at a certain point in revolutionary change. Becoming human was, according to this theory, a classic instance of a dialectical process, i.e. one in which quantitative change culminates eventually in a qualitative leap.
In 1996, Knight co-founded the EVOLANG series of international conferences on the origins of language, since when he has become a prominent figure in debates on the origins of human symbolic culture and especially the origin of language.