I think that I live a great life. I expect that it will be even greater in the future. But even recognizing this, I understand that one day it'll be the end of the line for me. Fortunately, that ain't today and I simply can't spend any time worrying about it.MediumTex wrote: What does it mean to be a long term optimist who also recognizes that time takes everything from everyone?
I see humanity and\or post-humanity as being in the same position. Yes, some day the sun will burn itself out, the stars will drift apart and the universe will grow cold. In the meantime, I think that technology holds incredible promise for our species, much of which we can't even predict.
Your thesis on energy is highly compelling but I still see it playing out differently. If and when the consequences of a true shortage in fossil fuels become apparent, dense sources of power with bad reputations (such as nuclear power) will be brought online much more readily and with much less hesitation. And nuclear power makes the energy density of even fossil fuels (incredible sources of energy) look like a joke.
Without question this comes with its own set of problems but consider how flexible people's thinking becomes when they are faced with an existential crisis. Throw in something futuristic like a space elevator that allowed us to "sling" containers of nuclear waste into the sun and I think that nuclear becomes a really, really easy tech to get behind.