In some respect there are certain nations in the world more powerful than others because they are geographically situated in such a manner so as to have access to better or more useful resources. For example a nation with access to major water routes or sea ports can have the much needed advantage of being able to ship and receive products by water. Nations that fall along more temperate climates and not within the extremes of the globe may be better suited to grow food and have an excess which can bolster a bigger, stronger, and more intelligent populace thus resulting in innovation and accomplishment which even furthers the nation more.
Aside from resources and agricultural benefits that some nations have over others there are also strategic military advantages to be had. Is it any coincidence that England had such widespread power and existed on an island isolated from the rest of the continent? Even during WWII Hitler couldn't take the grand victory he imagined because toppling the UK was not a simple task, he couldn't just march troops across their border, the English channel was in the way. The political aspects of geography are vitally important, any nation must recognize its own strengths and weaknesses as well as those of others if it wishes to succeed in its goals.