It's nice to know we agree about something, js1138. :^) Thanks for writing!
I think one of the places we disagree is in our expectations.
We do not know everything, but we know enough about filght, for example, to make aviation the safest long distance form of transportation in human history.
We know enough about medicine to wipe out Smallpox with a handful of doctors and a couple hundred paramedics, over a span of half a dozen years.
I think that technology will continue to progress, and in two hundred years our descendents will look upon our lives with horror, just as realistic people look upon the middle ages with horror.