Board Thread:Questions and Answers/@comment-24826159-20140416214818/@comment-18753817-20140419125735

Stefan (Shikai - "Rust & Shatter") wrote: Baus of Hogs wrote: Can't you be born in the soul society? So therefore it would be possible to be a reaper without being a human before... Right???

And how do you suppose a child is born in the Soul Society? Are you saying that Souls possess the same kind of reproductive system, that living humans do? Most Souls don't even require food to sustain themselves. The Soul Society is a place where Souls, whose mortal bodies have died, exist until they are reborn in the Human world. It is a system based on reincarnation, where the Soul takes shape after the Human body it once possessed. If the Human dies young, the Soul will arrive in Soul Society as a child.

Basically, Souls are not created out of "nothing", but follow a closed loop. That's also why the Soul Society declared war on the Quincy, because when they kill a Soul, they completely erase its existance; meaning it can never be reborn again. Yeah if you'd actually care to read the page on Soul Society it clearly states that. "Children can be born as they are in the Human World." plus there's no evidence of Shinigami souls being completely destroyed due to being killed by a Quincy that only goes for Hollows.