This brings us to Tibet and its importance to China. The Himalayas run the length of the Chinese-Indian border before descending to become the Karakoram Range bordering Pakistan, Afghanistan, and Tajikistan. This is nature’s version of a Great Wall of China, or—looking at it from New Delhi’s side—the Great Wall of India. It cuts the two most populous countries on the planet off from each other both militarily and economically.