ANSWER FOR NUMBER 1 : Europeans developed the system of feudalism to help provide economic and social stability and safety. Feudalism the feudal system arose as a way of protecting property and creating stability. It was based on loyalty and personal relationships. Monarchs have fiefs to lords, their most important vassals.
ANSWER FOR NUMBER 2: The crusades were organized by western European Christians after their centuries of Muslim wars of expansion. Their primary objectives were stop the expansion of Muslim states, to reclaim for Christianity the Holy Land in the middle east, and to recapture territories that had formerly been christian.
ANSWER FOR NUMBER 3: The crusades had greatly effected these important areas. The medieval society , the structure the trade and the political system. The political system was changed from feudalism to monarchy in Europe.
