The Brotherhood is the single religion of man. All other's have been outlawed and deemed heretical. The Brotherhood initiated and maintains a military force, crusaders and inquisitors root out and destroy the dark symmetry as it continually works against humankind to corrupt and to conquer.
The Brotherhood is not a megacorporation. It is a military enforced faith overseen by the Cardinal and sponsored by every corporation in some manner or other to protect, monitor, and enforce the Laws of Light and mankind..