8*20 is 160 billion, so your endowment's investment return is pretty optimistic. More importantly, inflation and opportunity costs will take a big chunk out of

8*20 is 160 billion, so your endowment's investment return is pretty optimistic. More importantly, inflation and opportunity costs will take a big chunk out of your investment. Assuming consistent 2% exponential growth, and a civilization lasting millenia, that generous $8 billion you set aside today for budget year 3018 is worth about $20 in today's dollars. http://www.in2013dollars.com/2018-dollars-in-3018?amount=20&future_pct=0.02 http://www.in2013dollars.com/2018-dollars-in-3018?amount=20&...