I was reading this article over at Stratfor.com titled The Geopolitics of the United States: The Inevitable Empire. Basically the article is an analysis of the favorable geography of the continent of North America which has virtually assured that any nation that controls at least the central core will become a great power. Here are some excerpts:
The American geography is an impressive one. The Greater Mississippi Basin together with the Intracoastal Waterway has more kilometers of navigable internal waterways than the rest of the world combined. The American Midwest is both overlaid by this waterway, and is the world’s largest contiguous piece of farmland. The U.S. Atlantic Coast possesses more major ports than the rest of the Western Hemisphere combined. Two vast oceans insulated the United States from Asian and European powers, deserts separate the United States from Mexico to the south, while lakes and forests separate the population centers in Canada from those in the United States. The United States has capital, food surpluses and physical insulation in excess of every other country in the world by an exceedingly large margin. So like the Turks, the Americans are not important because of who they are, but because of where they live.
The most distinctive and important feature of North America is the river network in the middle third of the continent. While its components are larger in both volume and length than most of the world’s rivers, this is not what sets the network apart. Very few of its tributaries begin at high elevations, making vast tracts of these rivers easily navigable. In the case of the Mississippi, the head of navigation — just north of Minneapolis — is 3,000 kilometers inland.
The network consists of six distinct river systems: the Missouri, Arkansas, Red, Ohio, Tennessee and, of course, the Mississippi. The unified nature of this system greatly enhances the region’s usefulness and potential economic and political power. First, shipping goods via water is an order of magnitude cheaper than shipping them via land. The specific ratio varies greatly based on technological era and local topography, but in the petroleum age in the United States, the cost of transport via water is roughly 10 to 30 times cheaper than overland. This simple fact makes countries with robust maritime transport options extremely capital-rich when compared to countries limited to land-only options. This factor is the primary reason why the major economic powers of the past half-millennia have been Japan, Germany, France, the United Kingdom and the United States.Second, the watershed of the Greater Mississippi Basin largely overlays North America’s arable lands. Normally, agricultural areas as large as the American Midwest are underutilized as the cost of shipping their output to more densely populated regions cuts deeply into the economics of agriculture. The Eurasian steppe is an excellent example. Even in modern times Russian and Kazakh crops occasionally rot before they can reach market. Massive artificial transport networks must be constructed and maintained in order for the land to reach its full potential. Not so in the case of the Greater Mississippi Basin. The vast bulk of the prime agricultural lands are within 200 kilometers of a stretch of navigable river. Road and rail are still used for collection, but nearly omnipresent river ports allow for the entirety of the basin’s farmers to easily and cheaply ship their products to markets not just in North America but all over the world.
Third, the river network’s unity greatly eases the issue of political integration. All of the peoples of the basin are part of the same economic system, ensuring constant contact and common interests. Regional proclivities obviously still arise, but this is not Northern Europe, where a variety of separate river systems have given rise to multiple national identities.
So long as the United States has uninterrupted control of the continental core — which itself enjoys independent and interconnected ocean access — the specific locations of the country’s northern and southern boundaries are somewhat immaterial to continental politics. To the south, the Chihuahuan and Sonoran deserts are a significant barrier in both directions, making the exceedingly shallow Rio Grande a logical — but hardly absolute — border line. The eastern end of the border could be anywhere within 300 kilometers north or south of its current location (at present the border region’s southernmost ports — Brownsville and Corpus Christi — lie on the U.S. side of the border).
Observe the commands of the LORD your God, walking in obedience to him and revering him. 7 For the LORD your God is bringing you into a good land—a land with brooks, streams, and deep springs gushing out into the valleys and hills; 8 a land with wheat and barley, vines and fig trees, pomegranates, olive oil and honey; 9 a land where bread will not be scarce and you will lack nothing; a land where the rocks are iron and you can dig copper out of the hills. (Deut 8:6-9)