The theory of garrison mentality argues that early Canadian identity was characterised by fear of an empty and hostile national landscape. It suggests that the environment's impact on the national psyche has influenced themes within Canadian literature, cinema and television. The term was first coined by literary critic Northrop Frye in the Literary History of Canada (1965), who used the metaphorical image of a garrison to illustrate that Canadians are defensive and hiding from external forces. It was then expanded upon by various other critics, including authors and academics. The garrison mentality is apparent in both older and more contemporary Canadian literature and media. The theory has received criticism and praise for its overarching premise that the natural environment has determined the qualities of a population.[1]