The Arctic is no longer a frozen periphery, especially not after the U.S. spat with Europe over Greenland. As sea ice melts, the High North is emerging as a strategic hub for energy, shipping and critical minerals. It is ?warming nearly four times faster than the rest of the planet, but what's also heating up is the debate over who will control the Arctic routes, rules and resources that will shape global markets for decades. While Russia and China are methodically building influence over the Arctic to enhance their economic leverage, Western policy is just beginning to catch up. RUSSIA'S…