23
" Take a moment, right now, and consider the enormity of activity going on inside of you – from the billions of cells to the even more billions of microscopic organisms. And in that same moment consider the enormity of activity in the oceans, the forests, the jungles, the earth below your feet, right now. And before you take your next breath, consider what might be going on in the outer regions of the universe. Finally, ask yourself, am I really in a position to discount possibilities beyond the limits of my conscious experience? "
― , Brain Drain The Breakthrough That Will Change Your Life
39
" Suppose that we believe that in 200 years, people would be prepared to pay a million dollars (that's in today's dollars, not inflated ones) to be able to have an unspoilt valley. Now imagine that today we can profit by cutting down the forest in the valley, which will never regrow. If we apply an annual discount rate of 5 percent, compounded exponentially, how big would that profit have to be to justify the loss of a million dollars in 2210? The answer, surprisingly, is just sixty dollars! That's all that a million dollars in 200 years is worth, at that rate of discount. Obviously, then, if we use a 5 percent discount rate, values gained one thousand years in the future scarcely count at all. This is not because of any uncertainty about whether there will be human beings or other sentient creatures inhabiting this planet at that time, but merely because of the compounding effect of the rate of return on money invested now. "
― Peter Singer , Practical Ethics