The year is 2016. You are Shinji, the son of the leader of a secretive governmental organization known as NERV. NERV's parent organization has recently completed the Human Instumentality Project, which it believes is the next step in humanity's evolution.
The Human Instrumentality Project has united the consciousnesses of all of humanity into a single, transcendental being without a physical body that exists outside the material world. Every human being that is part of the Instrumentality Project remains conscious and continues to experience existence, but is part of a greater whole in which they share the memories and experiences of every other human being alive. In Instrumentality, one can no longer experience physical pain or suffering.
You possess the capability to reject Instrumentality. If you do, you will return to the physical world as a human being. You know that other human beings also can choose to reject Instrumentality, but you do not know if any will do so.