The Hundred Years' War began as a dispute over succession to the French throne between the English and French royal families. Over time, it evolved into a war over territory in France that had been contested between the two powers for centuries. Craft guilds organized tradespeople and established standards for quality, prices and training apprentices. Growing trade in medieval Europe led to more goods, travel, towns, wealth outside the nobility, and social mobility based on money rather than birth. This weakened the rigid feudal structure and the power of the Catholic Church, which faced new questioning of its doctrines, wealth and authority in the 14th-15th centuries. Peasant revolts in France and England responded to attempts to rollback wages and impose new