Check out this book:
It's eye opening in showing how so many things can depend on one species. After reading this boook, I have wondered how menhaden would be managed in a libertarian society that allows ocean property rights.
"It may be a hundred years before a computer beats humans at Go - maybe even longer. If a reasonably intelligent person learned to play Go, in a few months he could beat all existing computer programs." - Piet Hut
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