So the synthesis is analogizing a parallel between the myth of Osiris’ murder, the course of the sun through the sky, and a human life. All three track a course from birth, through apex, into death, and from there rebirth into an afterlife. I don’t know if this necessarily serves as the “invention” of an afterlife, or one of a number of instances of people interring one. I do, however, see Eliade’s point as the analogous relationship between the different elements that are combined in Middle Kingdom religion.
