Even in the most industrialized nations, vast territories of land exist which are either, barren, rugged, mountainous, swampy or forested. In essence, they are un-subdued, waiting for a sufficient population to bring forth human forces to subdue them. For example, there are un-subdued deserts and mountains in California, enormous forests and plains in Canada, mountains and dry-lands in Mexico, jungles throughout the tropics around the globe and vast territories in Siberia, all waiting to be subdued. These are just a few of the many examples. Every country in the world has un-subdued land, even Bangladesh with its 120 million people. See www.pop.org for more details.