The minister in my church suggests that perhaps Christ came when he did
because the world conditions were "right" for receiving his message:
1. There were distributed nuclei around the known world who could
understand the message in light of the Old Testament teachings [due to
the dispersion of the Jewish people]
2. The world was stable enough so that people could travel between
these distributed nuclei [due to Pax Romana] so that the word COULD
spread, and
3. Travel was easier than it ever had been [due to Roman engineering].
Christ came when he did because it was the first time in history that
his message could reach the _whole_ world.