Canadian literature is literature originating from Canada. Some criticism of Canadian literature has focused on nationalistic and regional themes, although this is only a small portion of Canadian Literary criticism. Critics against such thematic criticism in Canadian literature, such as Frank Davey, had argued that a focus on theme diminishes the appreciation of complexity of the literature produced in the country, and creates the impression that Canadian literature is sociologically-oriented. While Canadian literature, like the literature of every nation state, is influenced by its socio-political contexts, Canadian writers have produced a variety of genres. Influences on Canadian writers are broad, both geographically and historically.