40 is a wild ride into implications of religion, politics, and humanity.  I saw many correlations to the present day world.  It reminded me of Hunger Games at times.  The story itself was fine and entertaining, but I wasn't vested as I thought I should be.  There were so many characters that I was constantly confused who people were.  The story makes me scared for the future of humanity.  Maybe we do need a do over.  We may already be on that path.