As Graham Greene once wrote, “There is always one moment in childhood when the door opens and lets the future in”. There is also a moment in adolescence when you’re welcomed outside into the wider world of culture too. For a rather sheltered Steven Spielberg, that was all the more vital and apparent. Spielberg was born and raised in rural Arizona, and he recently revisited that time for The Fabelmans, an epic that returned to the wide-open fiel…