The Silk Road was an ancient trade route that linked the Western world with the Middle East and Asia. It was a major conduit for trade between the Roman Empire and China and later between medieval European kingdoms and China. The Roman army made the roads and sea routes safe for traders. In turn, trade helped the economy grow. People in each area of the empire could sell what they grew or made to people in other areas who could use these goods. They could also buy things that they couldn't produce for themselves.
The 1920s industry that had the greatest effect on the economy of the 1920s was the A. automobile industry. Cars were very important at the time, and remain important even today.
