Why do economists study the money supply

The money supply is the total quantity of money in the economy at any given time. Economists measure the money supply because it is directly connected to the activity taking place all around us in the economy. In addition, the Federal Reserve's Board of Governors and the Federal Open Market Committee use this information as the basis of their monetary policy.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.