Of course this issue has been brought up before, but not in the way I saw it presented. I think this film is one BIG question, a question humanity has asked for centuries, a question religion tries to answer (or stifle, or bullshit). I've always been more about questions and answers. Looking for the answers is way more satisfying then getting them (because usually, we don't get them).
I HATE neat little boxes, and often times, when we pose questions, our answers are even more questions. When I say 'seriously' I mean, take 'seriously' the question and exploration of our origins.