When you look at the planet from low orbit, the impact of the Himalayas on Earth's climate seems obvious. It creates the rain shadow to beat all rain shadows, standing athwart the latitude of the trade winds and squeezing all the rain out of them before they head southwest, thus supplying eight of the Earth's mightiest rivers, but also parching not only the Gobi to the immediate north, but also everything to the southwest, including Pakistan and Iran, Mesopotamia, Saudi Arabia, even North Africa and southern Europe. The dry belt runs more than halfway across the Eurasia-African landmass -- a burnt rock landscape, home to the fiery religions that then spread out and torched the rest of the world. Coincidence?