Lebensraum was a revised colonial imperialism; Autarky a new expression of tariff protectionism; Strategic control of key geographic territories exhibiting the same thought behind earlier designs on the Suez and Panama Canals; a view of controlling the land in the same way as those choke points control the sea Pan-regions (Panideen) based upon the British Empire, and the American Monroe Doctrine, Pan-American Union and hemispheric defense,[13] whereby the world is divided into spheres of influence. Frontiers – His view of barriers between peoples not being political (borders) or natural placements of races or ethnicities but as being fluid and determined by the will or needs of ethnic/racial groups.