King John took the English throne in 1199. He made his people (and the clergy) so angry over his demands for more taxes and his harsh punishments that the people of England responded by creating a document known as the Magna Carta
Meanwhile, the Church was gaining a good amount of power, and we cannot talk about the High Middle Ages without noting that during this period, the famous Crusades began, sending knights and pilgrims to Jerusalem to take over the Holy Land.
In summary, the High Middle Ages saw many changes: more food, more people, and more trade with other cultures than ever before. New areas of the world were being explored. Life was certainly very different than it had been in the Early Middle Ages.