Answer:
The consequences of the crusades on medieval society were largely cultural and educational, crusaders brought back with them spices, herbs, jewelry, and music, changing the cooking for higher rungs of society and even affecting the beer for commoners and serfs. they also brought back the Arabic system of numbers, allowing scholars and mathematicians to do more complicated equations, bringing forth a new era of science and mathematics in Europe. the crusades also lead to one of the first forms of banking in Europe lead by the Knights Templar, loaning money to rich and poor alike. it also lead to the explosion of popularity of the free masons, traveling stone and wood workers, building bridges and cathedrals. all in all the crusades didn't change much for the common serf of the medieval period, but changed the educated caste of society forever.
