Obviously, the growth of Homo required other taxa to be consumed, since man don't feed on inorganic material. The principle of entropy guaranties that this equation holds even if inorganic input and outout into an arbitrarily defined system of organisms is considered.
It simply doesn't make sense to view living beings as either open systems without a clear boundary (and I don't mean cell walls), or as closed systems to the extent of inclusing ev-ery-thing.At best you have defined living being as open system that is "growing", but then you have excluded cancer already, as though any system were only open if in principle fungible for man.
You have completely missed that growth ad infinitum is problem, not re-growth.
