How might these civilizations trade within their own borders? With other civilizations?

When the first civilizations did begin trading with each other about five thousand years ago, however, many of them got rich…and fast.

Trade was also a boon for human interaction, bringing cross-cultural contact to a whole new level.

Luxury goods

When people first settled down into larger towns in Mesopotamia and Egypt, self-sufficiency – the idea that you had to produce absolutely everything that you wanted or needed – started to fade. A farmer could now trade grain for meat, or milk for a pot, at the local market, which was seldom too far away.

after the french-indian war.

the answer is a. harriet tubman was a nurse on the battlefield.