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In page Judaism:

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During the early years of the Second Temple, the highest religious authority was a council known as the Great Assembly, led by Ezra the Scribe. Among other accomplishments of the Great Assembly, the last books of the Bible were written at this time and the canon sealed[citation needed]. Hellenistic Judaism spread to Ptolemaic Egypt from the 3rd century BCE, and its creation sparked widespread controversy in Jewish communities, starting "conflicts within Jewish communities about accommodating the cultures of occupying powers."[2][3]