Answer:
The crusades of the 11th to 15th century CE have become one of the defining events of the Middle Ages in both Europe and the Middle East. The campaigns brought significant consequences wherever they occurred but also pushed changes within the states that organised and fought them. Even when the crusades had ended, their influence continued through literature and other cultural means and, resurrected as an idea in more modern times, they continue today to colour international relations.
Explanation:
Judaism and Cristianity spread around the world because Jews where kicked out of their countries to other parts of the world, and Christianity spread because of the work of their missionaries.
Because you believe in your god more than the other gods
