The Toronto School is a school of thought in communication theory and literary criticism, the principles of which were developed chiefly by scholars at the University of Toronto. It is characterized by exploration of Ancient Greek literature and the theoretical view that communication systems create psychological and social states. The school originated from the works of Eric A. Havelock and Harold Innis in the 1930s, and grew to prominence with the contributions of Edmund Snow Carpenter, Northrop Frye and Marshall McLuhan.
Since 1963, the McLuhan Program in Culture and Technology at the University of Toronto Faculty of Information has carried the mandate for teaching and advancing the school. Notable contemporary scholars associated with the Toronto School include Derrick de Kerckhove, Robert K. Logan and Barry Wellman.
The Toronto School has been described as "the theory of the primacy of communication in the structuring of human cultures and the structuring of the human mind." Eric Havelock's studies in the transitions from orality to literacy, as an account of communication, profoundly affected the media theories of Harold Innis and Marshall McLuhan. Harold Innis' theories of political economy, media and society had a significant influence on critical media theory and communications and with McLuhan, offered groundbreaking Canadian perspectives on the function of communication technologies as key agents in social and historical change. Together, their works advanced a theory of history in which communication is central to social change and transformation.