However, there is substantial indirect evidence that the movement pre-dated Christianity (for example, an early tradition says that Simon Magus, mentioned in Acts 8, was the “father” of Gnosticism). It may have originated in Alexandria, Egypt, in the first century B.C. as an aberrant form of Judaism, combined with certain ideas about divine reality drawn from the Platonism of the time (which had developed beyond the philosophical ideas of Plato). This movement then found its “home” in early Christianity,