For 10 points, name this Jamaican religion whose adherents believe Haile Selassie is Jah incarnate.
One of this movement's foundational texts concludes with a "Diploma" in a final chapter on "The Theological Lawgiver of Creation." That text helped inspire one of its adherents, who took the pen name G. G. Maragh to write about King Alpha and Queen Omega in another of its central texts, The Promise Key. The Prophet Gad founded one of this movement's branches, or mansions, known as the Twelve Tribes of Israel. Other important textual sources for this religion include one organized into four "Books of (*) Athlyi," The Holy Piby, and one that describes a dynastic line descended from Queen Makeda, the Kebra Nagast. Adherents of this religion celebrate several grounations, partake of the i-tal diet, and participate in ceremonies known as reasonings that feature the smoking of ganja. For 10 points, name this Jamaican religion whose adherents believe Haile Selassie is Jah incarnate.
One of this movement's foundational texts concludes with a "Diploma" in a final chapter on "The Theological Lawgiver of Creation.
{Rastafarianism} [Accept {Rasta}]