For me the most interesting was information about the cost for transportation. For tellurocratic states (Russia, China, etc.) to have a trade advantage over the thallasocratic (USA, UK, Japan etc.) we need to make the cost for transportation by rail cheaper than by sea. The second option is the development of the Northern Sea Route. This route is almost 100% controlled by Russia, and it is cheaper and faster than through the Suez Canal. Given that Russia/China have reached parity in military power with the West, I am 100% confident that the 21st century will be the century of Tellurocracy or Hearthland - if we will nullify control of USA over most of world trade routes.