@ITTO
Much of nation's recent growth may have been a mirage
http://www.washingtonpost.com/wp-dyn/content/article/2011/02/01/AR2011020106617.htmlThe title is misleading. But it deals with invention and how it effects human lives, and indirectly economics.
The steam engine did more to better people's lives then the internet, all the computers and everything else put together.
Originally steam engines where used to pump water out of mines. So now mines could go deeper. This lowered the price of mineral resources etc.
That was the vision of James Watt.
Then the steam engine was used to operate lifts, so miners did not have to spend 4 hours of their shift going up and down.
Then it was used to replace water/wind power, which sparked the industrial revolution.
And finally it was used for transportation.
This happened over a period of 100+ years.
If you probably told James Watt after he made his first steam engine and installed it at a mine. (amazingly some of them are still working to this day)
That he would affect everyone's lives from the clothes they wear, how they travel etc.
Probably he himself would not have believed it.