The French Revolution was caused by social, political and economic problems. People were in discontent with the king. The first two estates were privileged and the third was very unprivileged and had to pay heavy taxes. The third estate did not get along with the first two.
They had to reinvent their economy because General Shermans tactic of total war. when he did total war, he marched from the north all the way to Atlanta, Georgia and destroyed anything that couldn't be used as food or supplies. so they had to reinvent their economy because the south was totally destroyed