Sure, trade is a significant factor. It's been theorized that the Presocratic philosophers developed at the time and place they did because of the expansion of the region and ideas in relation to trade routes. These thinkers travelled around and had greater access to a greater wealth of knowledge. But no it doesn't all come back to capital. That's your God, not mine. I have no God of economics or otherwise.
There are many factors to technological development and that is why I said at 'the core'. Because there have been plenty of periods of trade and exchange of capital with little technological or scientific advances. Scientific advance is the key to technological advance because the more we understand about the way the world functions the more we can manipulate it to our behest. But yes, trade does play a significant role in scientific growth also.
I don't see how this is really a response to my quoted statement. I am saying that technological advances lead to moral elbow room to advance justice. I would assume that the Ancient Egyptians doing away with slavery would have been better for the community as a whole. But my point is that such a thing could not happen at that juncture in history because technology had not advanced to the point to allow sufficient moral elbow room to do so.

