The paper this article talks about was authored by an evolutionary biologist that wanted to talk about environmental science problems and social responsibility. Ignoring the concepts of personal property and ownership and stuff, think about this for a minute. 81% of Americans own a yard, but how many of them do you see growing crops in that space? How much more effectively COULD that land be utilized towards the common good if it were managed in some way? Or from the other side: the Alaskan government had to step in and put a halt on Bering Sea crab harvests for a few years because the numbers were critically low. Do you think all of the individual fishermen who are reliant on that income would have voluntarily stopped? Would they even have known the crab population was dwindling?