Read this a while back:
http://www.omaha.com/index.php?u_np=0&u_pg=1642&u_sid=1346946For those too lazy to read, its about a guy who apparently has very good credentials as an inventor and a computer scientist and has won numerous awards and is an MIT graduate who claims that humanity is 20 years from achieving immortality via nano-machines that will repair your body and keep you healthy and alive indefinetely.
Whether he's a loon or is correct, his claims open pandora's box (at least for me).
So, discuss here! Imagine the immortality nano-machines were a reality today.
Imo, first off... AWESOME. Eternal life unless you get killed by anything other than natural causes.
But.... imagine the amazing changes that would bring. Good and Bad. The more I think about things the more 'bad' comes to my mind than good.
Control
The Bad: Eternal life as the ultimate drug. If you disobey whoever controls the supply of the things just has to withdraw the 'services'.
The Good: Hmmm..maybe it will reduce crime rate way down.. maybe not

Overpopulation
The bad: Heck humans already overpopulate the earth. With death rates reduced to zero we'd be digging our own graves as resources become so scarce we'd be replacing death via natural causes with death via starvation or war. If we adopt the Chinese solution of 1 child per couple maybe we can do it... but..... 1 kid for all eternity?
The Good: I cant think of any.
Effects of increased (or endlesS) lifespans:
The Bad: Its kinda funny but the bad things i can think of all come from sci-fi and fantasy books.
Science fiction says that the eternal lifespans would cause the human race to stop its evolution...cause if you dont breed your genes dont mutate and (hopefully) improve with each generation. Yes, we can be immortal and breed like mad bunnies but imo the birth rates would go waaaay down if you live forever and keep spawning more immortals in a planet that is already strained from overpopulation.
Fantasy books usually have elves as the immortal race... and the problems the authors put foward are usually about psychological issues (too many memories, ritualization of every single aspect of life since life dragged on and on, boredom and the subsequent degradation of morality as people 'try' different things, etc).
The good: welp, maybe we can finally take that trip to another star system in a 10,000 year trip and we could expect to be alive when we get there.. just bring plenty of twinkies in the cargo hold
