Though more than half of Canadians live in just two provinces (Ontario and Quebec), each province is largely self-contained due to provincial economic self-sufficiency. Only 15 percent of Canadians live in a different province from where they were born, and only 10 percent go to another province for university. Canada has always been like this, and stands in sharp contrast to the United States' internal mobility which is much higher. For example 30 percent live in a different state from where they were born, and 30 percent go away for university. Scott Gilmore in "Maclean's" argues that "Canada is a nation of strangers", in the sense that for most individuals, the rest of Canada outside their province is little-known. Another factor is the cost of internal travel. Intra-Canadian airfares are high—it is cheaper and more common to visit the United States than to visit another province. Gilmore argues that the mutual isolation makes it difficult to muster national responses to major national issues.