Bodies of water, specifically rivers.
There is an agreement of price and quantity in the market therefore all market forces stabilized and reached a price that consumers are willing to pay for goods and producers a price at which they are willing to produce in order to make a profit
The church played a very important role because it was "all around" in medieval times. On the level of almost every village there was a church and a priest which helped spread the word of the christian god. Through this, almost every person down to a villager somewhere in a village in Europe was able to come to church where people gathered on Sundays and hear new information and educate himself on various things related to faith and religion.
One of the most powerful bankers of his era, J.P. (John Pierpont) Morgan(1837-1913) financed railroads and helped organize U.S. Steel, General Electric and other major corporations. ... Morgan used his influence to help stabilize American financial markets during several economic crises, including the panic of 1907
