The Canon Debate

What does it mean to speak of a "canon" of scripture? How, when, and where did the canon of the Hebrew Bible come into existence? Why does it have three divisions? What canon was in use among the Jews of the Hellenistic diaspora? At Qumran? In Roman Palestine? Among the rabbis? What Bible did Jesus and his disciples know and use? How was the New Testament canon formed and closed? What role was played by Marcion? By gnostics? By the church fathers? What did the early church make of the apocrypha