cycle that would repeat itself a number of times in different parts of the country through the 17th century. As the 16th century had worn on, inflation in Spain (a result of state debt and, more importantly, the importation of silver and gold from the New World) triggered hardship for the peasantry. The average cost of goods quintupled in the 16th century in Spain, led by wool and grain. While reasonable when compared to the 20th century, prices in the 15th century changed very little, and the European economy was shaken by the so-called price revolution. Spain, which along with England was Europe's only producer of wool, initially benefited from the rapid growth. However, like in England, there began in Spain an inclosure movement that stifled the growth of food and depopulated whole villages whose residents were forced to move to cities. The higher inflation, the burden of the Habsburgs' wars and the many customs duties dividing the country and restricting trade with the Americas, stifled the growth of industry that may have provided an alternative source of income in the towns. Another factor was the militaristic nature of the Castilian nobility, which had developed during the centuries of the reconquest of the Iberian Peninsula. They preferred careers in the government bureaucracy, the military, or the church, shunning economic activities. This militarism also meant that Spain exhausted its wealth and manpower in near-continuous wars. Under Philip II, these wars had much to do with combating Protestantism, but in the 17th century it became clear that the world that had existed before 1517 could not be restored. Spain's wars during that century became increasingly more to do with preserving the hegemonic power of the Habsburg alliance in Europe; although the Habsburg alliance was successful in buttressing the Catholic Church against the rise of Protestantism. Sheep-farming was practiced extensively in Castile, and grew rapidly with rising wool prices with the backing of the king. Merino sheep were annually moved from the mountains of the north to the warmer south every winter, ignoring state-mandated trails that were intended to prevent the sheep from trampling the farmland. Complaints lodged against the shepherds' guild, the Mesta, were ignored by Philip II who received a great deal of revenue from wool. Eventually, overtaxed Castile became barren, and Spain, particularly Castile, became dependent on large imports of grain to make up for crop shortfalls, that, given the