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Humans Will Sail To The Stars
oddsheep points to an "article on BBC news from the AAAS Expo in Boston about how researchers are discussing spreading the human race across the galaxy in solar sailing ships. Not a new idea of course but the social implications discussed are great: what the hell do the volunteer colonists (and their descendants) do for the hundreds of years it would take to get anywhere? Cue "Are we nearly there yet?" from the back seats ad infinitum and the longest game of 'I Spy' in history..."
I still think the easiest way to spread the human race to other stars in a Van Neuman machine. It's a self-replicating machine that when it finds a good planet will first terraform it that clone humans to live on it (I may be confusing it with something else but I think I got the basics right). This would not only be drastically cheaper and more practical it holds much more potential for the spread of the human race. It also avoids finding a way to keep a bunch of people occupied for several decades.
I stole this Sig
Technology is advancing so quickly that people would realize that any group that launched such a voyage would be passed by a faster group within a few years.
That thought is likely to limit our voyages at any given time to a radius that can be reached in probably about a decade or less with current technology.
In the meantime, they'll be pushing the limits harder with unmanned probes that can endure tremendous accelerations.
And until such probes provide proof that there is an inhabitable world at the end of the journey, I find it extremely unlikely that anyone will put together a space city and launch themselves into the unknown for an unknown number of centuries toward an end that's more likely to be a massive destructive event (either external or internal) than an accidental discovery of Earth II.
"Those who have never entered upon scientific pursuits know not a tithe of the poetry by which they are surrounded."
What you are asking for is impossible.
You want people to stop being selfish, solve all the world's problems, and in general, become angels.
Since this will never happen, your goal will insure that we will never pollute the universe with our evil selves.
Here's a point: the very things that make us "evil", such as greed, lust, territoriality, warlike tendency, aggresssion -- all of that -- are precisely the qualities that make a species dominant over others in the evolutionary sense. And given that, if we do go to the stars, and meet others, I'd guarantee that those others will be selfish, paranoid, violent and warlike. A species without those traits would not have survived the test of time. If we go to the stars as Zen Buddhist monks, those colonists will be annihilated by the locals - even if the locals are bloody non-sapient crytals. Life is hungry and pitiless.
As for a great future for humanity among the stars: by your logic, Europeans should never have left their continent. Instead, they should have stayed home and perfected their societies.
Well, think of this. If there had been no Canada or United States, what do you think would have happened to world civilization after World War I or II? The Western Hemisphere was critical - CRITICAL - in defeating a thousand years of twisted nationalism, and in rebuilding the shattered nations in the aftermath. If Europeans had not left their homes and travelled to the New World, the Old World would have shattered into a new iron age, and would not have recovered for centuries -- if ever. New worlds create opportunity for those who would want to leave, and create resources that can be used to shore up those left behind, even heal them and advance them.
The fallacy is the basic Zero-Sum game. The idea that there is a finite ulimate prize to human endeavor will concentrate human social toxins, and ultimately kill us all. We need the IDEA of new horizons, even if we don't have them yet.