Jews believe that God chose them as an example to the people, they believe this from "The Old Testament". They believe that their relationship with God is shown by them being "chosen", and that they watch God change and develop the people.
The birth of Judaism was in the Middle East, and known as the Bronze Age, it's told in the first five books of the bible. The Jews have a structured religion with Gods guidance.
The nine plagues are, the plague of blood, the plague of frogs, the plague of lice, the plague of flies, the plague of livestock, boils, the plague of hail, the plague of locusts, and the plague of darkness.