How did trade affect sumerian society?

Trade allowed the Sumerians to develop more as they gained access to raw materials that were not available locally. For example copper and timber, especially Cedar from Lebanon, allowed them to create important new tools and buildings, and their daily lives were made a lot easier as a result.

The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects