The invention from Song, China that had the greatest influence on the spread of learning was paper and printing. This helped to get the public interested in reading.
Their colonial experience led them to the point where they were sick of monarchistic European influence and wanted to create a fully democratic republic, created by the people for the people, not for the well being of a royal family.
Because it expressed the fact that Americans didn't want European countries that had economic or colonists interests to put a foot in the United States.
If they produce too many things and the demand is low they will have to lower their prices/pay workers less to make them.
