The exact reason for the Merge is presently unknown.
The action of Merging caused massive disorder in Emenata, causing large space-time disturbances, planets to shift out of orbit, and even destruction of stars. But eventually balance was reached.
Many religions believe that this Merge was the result of the action of some kind of higher being, known as the 'Supreme Creator'.
Emenatan standard chronology uses the Merge as a reference point (see Multiverses Timeline). Dates prior to it are BM (before Merge) and dates after it are AM (after Merge). The current year is 4 million AM.