The document summarizes changes in Europe between 1000-1500 AD, from the early to high Middle Ages. It describes improvements to agriculture like the heavy plow and three field system that increased food production. As populations grew, more people moved to towns to join the emerging middle class of burghers, bourgeoisie, and merchants. Trade also expanded through routes like the Mediterranean and Hanseatic League, supported by the establishment of local and great trade fairs. New social classes and business practices like guilds emerged as Europe transitioned from feudalism.