Probably one of the more important developments that led to the revival of Europe was the new world of trade and cities. Trade, however, occurred gradually. After the decline in trade in western Europe, which was primarily agrarian, skilled people and necessary products for trade began to emerge. Not only htat, but the clearing of the Mediterranean through the Crusades and Europe’s reconquering of land enabled trade to take place. In fact, Italy led the revival. In the north, Flanders was benefiting from trade. To promote trade between the two leading cities, fairs were set up where the exchange of goods increased greatly. With this expansion of trade led to the monetary system regeneration. These all contributed to capital capitalism.