1. It accounts for virtually all the reports emerging from modern research into afterlife phenomena.
2. It accounts for the vast majority of humanity's religious teachings about death and the afterlife, explaining why people would have arrived at those conclusions.
3. It is based on modern scientific knowledge about how the mind functions.
But the oddest thing is that this theory, though newly rediscovered, is among the oldest of explanations - perhaps the oldest explanation - ever devised by the human mind for a series of puzzles about life, death, and the afterlife.
The simple premise of the BSD is that we DO survive death - our psyches do continue to exist and function after the demise of the physical body, but at the tragic cost of being ripped apart into two separate pieces, each of which goes on without the other into a different, crippled afterlife experience.
WHY? Why would we suffer such a division at death? Why would our minds fracture apart during the death transition? Quite simply, because we, as a species, are insane. That is to say, our minds are broken and malfunctioning. Look around at the world we live in and you'll see all the evidence of this anyone could ever need. Our minds aren't working right. The two halves of our psyches aren't communicating together successfully. Humanity's conscious and unconscious minds are strangers to one another; our right and left brains are not on speaking terms; our heads and hearts are enemies; our souls have been alienated from our spirits.
Yes, we are immortal beings, but immortal beings with severely malfunctioning psyches. Being immortal beings, our minds cannot actually die, but they can suffer from an extreme dysfunction that continues from lifetime to lifetime.
None of this is new. Most people already accept the idea that we survive death. And most people also accept the idea that the human race is a very sick species. The only thing the BSD adds to these observations is that death is no panacea. It does not, in and of itself, fix all our ills.
Why are we insane? It's no one's fault but our own. Every time we lie to ourselves, every time we reject, deny, and ignore our own thoughts and feelings, every time we defy our own consciences and betray our own highest ideals, we become more and more self-alienated, and thereby unknowingly rip our very beings into fragments. And we do this lifetime after lifetime. If we divide at death, it's only because we spend our lives ripping ourselves apart.
This, in a nutshell, is the vision of the binary soul doctrine, the common vision of numerous ancient religions all over the planet.