<span>gency called the U.S. Geological Surveyor aka usgs</span>
Loss of factory jobs led to less in the middle class or you needed to work a white collar job to be middle class.
Industrial jobs moved overseas leaving those working in factories without jobs. Middle class jobs no longer included factory work but rather service jobs many requiring college degrees.
When they started to build an empire around the Mediterranean but wasn't until about the 6th century I believe. Hope I helped
A substantiated opinion is best supported by facts, like : studies, data, and research.
Hope this helps you :)
Japan the develope country in 1980