Thanks everyone, for your interesting responses to my questions.
I realize that I have been attempting to jump to some conclusions withouth sufficient information. The lapis came from Afghanistan...Which civilization did that belong to?
But
The fact that there were only a few big civilizations (empires) at that time
is part of the fascination of the issue of trade...even if lapis is not the best example.
They were thousands of miles apart, but did they trade with each other?
Makes me wonder if the diplomats, & scholars of Egypt trveled
to Indus valley to see what was was going on over there, to talk to their wise men and powerful leaders. Since there were only a few written languages, and only a few could read them, I would think that the literati in one culture would be fascinated by the other culture.
Did the Egyptians invite the Harrappans to come look at the pyramids?
What did the Egyptians exchange for the lapis or whatever they imported.

The deeper you go, the higher you fly.