The Relevancy of the Heartland - Hinterland Distinction in Canada's Economic Geography Until the early 20th century, Canada was primarily an agricultural nation. Since then it has become one of the most highly industrialized countries in the world as a direct result of the development of the ‘heartland'. To a large extent the manufacturing industries present in the heartland are supplied with raw materials produced by the agricultural, mining, forestry, and fishing sectors of the Canadian economy, a region known as the ‘hinterland'. The ‘ heartland-hinterland' concept in Ca