One could point out if Catholic Church had nix this the great scism and the reforism might of been avioded. And catholism would be closer to two billion than just one. Add to that the Catholic Church fading fast in educated industrial countries. Also Islam would have might never had happened, it was created in respounce to the divinity of christ. So now because of this holding to an illogical belief christendom lost two billion.
Basicaly because an empeor said this is so, and kill the rest.