Every time humans discovered a new resource, or technique for using mass and energy, one side effect has always been pollution. Why should the inform… - David Brin

Of protein, phosphorus, nor even energy is there ever enough to slake all hungers. Therefore, show not affront when diverse beings vie over what physically exists. Only in thought can there be true generosity. So let thought be the focus of your world.

You think I'm kidding? the pilot asked.
No, we think you're crazy.

We already live a very long time for mammals, getting three times as many heartbeats as a mouse or elephant. It never seems enough though, does it? Most fictional portrayals of life-extension simply tack more years on the end, in series. But that's a rather silly version. The future doesn't need a bunch of conservative old baby-boomers, hoarding money and getting in the grand-kids' way. What we really need is more life in parallel — some way to do all the things we want done. Picture splitting into three or four "selves" each morning, then reconverging into the same continuous person at the end of the day. What a wish fulfilment, to head off in several directions at once!