Wolves in sheep's clothing

The history of Christianity should have been written as a slow and steady growth that spread to villages, towns and cities until one country after another became Christian and the world would be a place of peace and all wars would cease. But that never happened. Wars, disasters, famines and crime are still with us and there is no peace on earth, no matter how many Christmases we have or large revivals we plan. What did Jesus say would happen to his disciples? Why is the world the way it is? And what is to come?