Communism opens up "Living Space" by increasing the Productive forces, unleashing technological advancement and ensuring that the economy is operated for the common good.
Nazism opens up Living Space (Lebensraum) by killing fellow humans while worshipping some "master race" (a heresy against God)
Obviously these two things are not the same, as the CIA's Congress for Cultural Freedom which invented the word "Totalitarianism" would have us believe.
American "Living Space" is Life, Liberty, and the Pursuit of Happiness