How long would it take for humanity to rebuild our civilization from the ground up?

Assume that everything man-made is wiped off the planet and all we're left with is nature and our knowledge. If all of humanity focused on rebuilding the world to return it to its current state, how many years would it take? And by "current state" I mean a world with cars, skyscrapers, rocketships, etc.

Asked By: Anthony F - 4/12/2007
Best Answer - Chosen by Asker
The first thing that would happen is a large and costly reduction in world population, and dealing with pestilence of humans without their trash services, etc. Before all that turmoil, no rebuilding of society can truly occur; there would be too much violence fighting over scarce resources... More
Answered By: Andrew H - 4/13/2007
Additional Answers (10)
About 6,000. This is the time of early civilizations, creation of farming, etc.
Answered By: R B - 4/12/2007
Why bother?
Answered By: Rouge Rocker - 4/12/2007
Probably around the same length of time it took the first time around.
Answered By: ben_of_marlow - 4/12/2007
It will take time for sure! I guess it depends on how much humankind remembers its knowledge (what we know to figure things out) and its history... You know the saying: "Those who don't know their history are doomed to repeat it" ?
Answered By: Kathy - 4/12/2007
We depend on food, water, and shelter, thus mass genocide would occur. I would suggest forming a commune with farmers. I have no idea how many years it would take, but your best bet would be living with someone to provide your basic needs.
Answered By: DisOrder - 4/12/2007
The question isn't quite right. Man-made things are what keep our knowledge alive, not the other way around. Most of our knowledge is not in heads. It's in books, on computers, encoded in our artifacts. Quick: recite all the Britannica articles you know by heart... More
Answered By: cantanollorres - 4/13/2007
About as long as it took to gather the materials, make the tools, and harness the manpower. Not like everyone would be off sailing or playing nintendo - they'd need something to do. If we still had the knowledge - wouldn't take that long at all. I'd say .. 50 years.
Answered By: Zasu - 4/19/2007
it would take about 692 years
Answered By: THE BUSY BEE - 4/20/2007
about thirty years
Answered By: skincancerdoctor - 4/20/2007
Read Genesis ch 1. Complete systems are built in one day. So a complete new heaven and new earth will take 6 days. We don't have to assume it- the world and the heavens will be dissolved by fire.
Answered By: copperhead89 - 4/20/2007
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