On Earth, things have changed. There is no war, violence, or petty misunderstandings anymore. You are raised from birth accordingly, and are taught to take one test, the most important test of your life, the Turning Time Test. This test determines your destiny, your fate. Then you make your choice, whether you stay and work now, in this life, or are reborn into a Society-chosen time period with no memory of your past life. The choice is all yours, but in the Society's case the choice may not always be final.