Exploring the Uniqueness of the God of Israel

In the modern Western world, monotheism is the rule, rather than the exception. Not so in the ancient past, where many cultures worshipped whole pantheons of gods, each one responsible for specific areas of the mortal experience. How does the one god of Israel compare to this myriad of deities, and can an understanding of how ancient mediterranean cultures thought about and interacted with the divine help us to understand the god presented to us in the Bible?