" Unfortunately for the existing mature systems in nature, the rapid expansion of the human bubble is destroying them. Unfortunately for us, we can't exist without them any more than a living person can exist without oxygen or a body can exist without a head. In this sense, it is actually a conceptual error to define the environment as the rest of the biosphere save humans, and think of ourselves as apart from it, since we can't exist without it. "

― Jacob Lund Fisker , Early Retirement Extreme: A Philosophical and Practical Guide to Financial Independence