If the Exodus didn't happen, the Jews wouldn't put themselves under the Mosaic law

[dimaniac]

Most of the OT was written between 700 and 500 BC, including the parts which purport to tell of the Exodus supposedly around 1400 BC. In the era when the OT was written the Jews were getting the shit kicked out of them by the Assyrians and the Babylonians. Jewish nationalists made up a religion which was totally monotheistic in contrast to the actual beliefs of the people who thought Yahweh had a wife. Furthermore, their newly minted religion was extremely difficult in order to prevent assimilation. For instance, circumcision and the weird dietary laws set them apart from other nations. It was in this era in the reign of Josiah that someone conveniently found a long-lost book of the law in the temple, namely Deuteronomy, a classic case of literary forgery.

http://en.wikipedia.org/wiki/Bible_code

One cited example is that by taking every 50th letter of the Book of Genesis starting with the first taw, the Hebrew word "torah" is spelled out. The same happens in the Book of Exodus.