Good thing for the Antarctic Treaty System with the purpose of preventing the Soviet Union, and now Russia, from taking control of the land. Otherwise- with Russia's same intent of spreading Russian Military power across the North Pole, Russia clearly would have done the same in Antarctica, if they could. And Antarctica, unlike the Arctic Ocean, is stable, only except for the coast. If Russia were to take control of all of Antarctica, and able to launch attacks from such many longitudes, the two sides would become deadlocked, amirite?