In answer to some or your questions & statements newfunturistic

I have been a reader of the Urantia Book since 1976.

I was raised Catholic and became an atheist in collage. Found the book in 1976 and read it at the recommendation of a friend. It took me six months to finish it from cover to cover. I don’t believe it is BS.

The Urantia book was not channeled. The process had it’s beginnings in about 1919. Part I-II were completed in 1934. Part III-IV were completed in 1935.

The Celestial authors are clearly listed in the table of content:

PART I The Central and Superuniverses Nr. · Paper · Author · Page 001 · The Universal Father · Divine Counselor · 21 002 · The Nature of God · Divine Counselor · 33 … The humans who witnessed the contact (“The Contact Commission” - two of whom were MD’s). One of these doctors was active in debunking “Frauds, Spiritualist, and Psychic” which were “the rage” in the 1920s.

A Melchizedek is an order of divine sons, one of whom, incarnated (took human form) about 2000 years before the incarnation of Jesus of Nazareth (another divine son). His mission was to keep the monotheistic idea of God alive in the minds of men. And Yes - The Jewish priests edited the historical records during the Babylonian captivity.

“The teaching of Melchizedek was full and replete, but the records of these days seemed impossible and fantastic to the later Hebrew priests, although many had some understanding of these transactions, at least up to the times of the en masse editing of the Old Testament records in Babylon.” 93:9.7 (1023.4) “What the Old Testament records describe as conversations between Abraham and God were in reality conferences between Abraham and Melchizedek. Later scribes regarded the term Melchizedek as synonymous with God. The record of so many contacts of Abraham and Sarah with “the angel of the Lord” refers to their numerous visits with Melchizedek. …The Hebrew scribes therefore destroyed every record of these momentous times which they could find, preserving only the narrative of the meeting of Abraham and Melchizedek after the battle of Siddim, which they deemed reflected great honor upon Abraham.” 93:9.10 (1024.1) “And thus, in losing sight of Melchizedek, they also lost sight of the teaching of this emergency Son regarding the spiritual mission of the promised bestowal Son; lost sight of the nature of this mission so fully and completely that very few of their progeny were able or willing to recognize and receive Jesus when he appeared on earth and in the flesh as Machiventa Melchizedek had foretold.”
Neither Jesus or Melchizedek shagged any female. One of the incarnation mandates is that a divine son may not procreate offspring.

I know ordinary people, Catholic priests, Protestant ministers, and PHD Scientists, who are readers of the Urantia Book. Here is what Dr. Kary Mulliis (the inventor of the widely misused PCR Test) said:

https://www.karymullis.com/urantia.html

The Urantia Book The Urantia Book was purportedly written by extraterrestrials and published in 1955. It has been freely available on the internet since 2001. Several scientific developments, unexpected in 1955, reported in 2005 in Science and Nature, and referenced below, were somehow, described rather precisely already in the Urantia Book. I have documented three cases here, but there are many contemporary scientific discoveries which were first posited as far as I can tell, in this rather large tome. There is much in here, the truth of which cannot be judged from the apparent truth of these several instances. The book claims a large number of authors. Much of it would be considered "politically incorrect" and might infuriate some people. I suggest that you not be shooting at the messenger; I am just reporting what I have observed. Striking Coincidences Between The Urantia Book (Copyright 1955)three articles in Science: 309 (2005), and one in Nature, (2005) Urantia Book "4,500,000,000 years ago the enormous Angona system began its approach to the neighborhood of this solitary sun. The center of this great system was a dark giant of space, solid, highly charged, and possessing tremendous gravity pull." "As the Angona system drew nearer, the solar extrusions grew larger and larger; more and more matter was drawn from the sun to become independent circulating bodies in surrounding space. This situation developed for about five hundred thousand years until Angona made its closest approach to the sun; whereupon the sun, in conjunction with one of its periodic internal convulsions, experienced a partial disruption; from opposite sides and simultaneously, enormous volumes of matter were disgorged. From the Angona side there was drawn out a vast column of solar gases, rather pointed at both ends and markedly bulging at the center, which became permanently detached from the immediate gravity control of the sun." (Urantia paper 57: The Origin of Urantia) Science "The Moon and all the terrestrial planets were resurfaced during a period of intense impact cratering that occurred between the time of their accretion, 4.5 billion years ago (Ga), and 3.85 Ga" "The mechanism responsible for ejecting asteroids from the main asteroid belt and into terrestrial planet-crossing orbits during the LHB had to be unique to the early solar system, because there is no evidence for any event of similar magnitude in the inner planets' cratering history since then. Furthermore, that mechanism had to be one that ejected asteroids from the main belt in a size-independent manner, preserving the MBA size distribution in the inner planet impactor population. This precludes size-dependent nongravitational transport processes, such as the Yarkovsky effect, and instead implicates a dynamical process, such as sweeping gravitational resonances, that is largely insensitive to asteroid mass." (Science: The Origin of Planetary Impactors in the Inner Solar System) Science Vol 309:1847 (2005).   The long-favored paradigm for the development of continental crust is one of progressive growth beginning at 4 billion years ago (Ga). To test this hypothesis, we measured initial 176Hf/177Hf values of 4.01- to 4.37-Ga detrital zircons from Jack Hills, Western Australia. Hf (deviations of 176Hf/177Hf from bulk Earth in parts per 104) values show large positive and negative deviations from those of the bulk Earth. Negative values indicate the development of a Lu/Hf reservoir that is consistent with the formation of continental crust (Lu/Hf 0.01), perhaps as early as 4.5 Ga. Positive Hf deviations require early and likely widespread depletion of the upper mantle. These results support the view that continental crust had formed by 4.4 to 4.5 Ga and was rapidly recycled into the mantle. (Science: Heterogeneous Hadean Hafnium: Evidence of Continental Crust at 4.4 to 4.5 Ga) Science 310: 1947 (2005). (Science: A Tale of Early Earth Told in Zircons) Science 310:1914 (2005)   The Urantia Book "800,000 years ago game was abundant; many species of deer, as well as elephants and hippopotamuses, roamed over Europe. Cattle were plentiful; horses and wolves were everywhere. The Neanderthalers were great hunters, and the tribes in France were the first to adopt the practice of giving the most successful hunters the choice of women for wives." "The reindeer was highly useful to these Neanderthaler peoples, serving as food, clothing, and for tools. Since they made various uses of the horns and bones. They had little culture, but they generally improved the work in flint until it almost reached the levels of the days of Andon (a reference to a stage of civilization described earlier in the book).Large flints attached to wooden handles came back into use and served as axes and picks." (Urantia Paper 64: The Neanderthal races) Nature A recent article in Nature, "The earliest record of human activity in northern Europe" Parfitt, S. A., et al, 2005:1008-1012, (Nature 438:1008 (2005). "Life on the Costa del Cromer" Nature 438: 921 (2005);described flint artifacts from the Cromer Forest-bed Formation at Pakefield, Suffolk, UK, from an interglacial sequence yielding a diverse range of plant and animal fossils. Event and lithostratiographic, paleomagnetism, amino acid geochronolgy and biostratigraphy indicate that the artifacts date to the early part of the Brunhes Chron (about 700 kyr ago) and thus represent the earliest unequivocal presence [of humans] north of the Alps. "Until now, the earliest uncontested artefacts from northern Europe were much younger, suggesting that humans were unable to colonize northern latitutdes until about 500kyr ago." "The artifacts, all in vary sharp condition are made of good quality black flint."   Urantia Book

37,848 years ago: "Adamic uplifting of human genetic stock"

Urantia Paper 74: Adam and Eve "Adam and Eve arrived on Urantia, from the year A.D. 1934, 37,848 years ago. It was in midseason when the Garden was in the height of bloom that they arrived. At high noon and unannounced, the two seraphic transports, accompanied by the Jerusem personnel intrusted with the transportation of the biologic uplifters to Urantia, settled slowly to the surface of the revolving planet in the vicinity of the temple of the Universal Father. All the work of rematerializing the bodies of Adam and Eve was carried on within the precincts of this newly created shrine. And from the time of their arrival ten days passed before they were re-created in dual human form for presentation as the world's new rulers. They regained consciousness simultaneously. The Material Sons and Daughters always serve together. It is the essence of their service at all times and in all places never to be separated. They are designed to work in pairs; seldom do they function alone. 
Both the physical and spiritual visions of Adam and Eve were far superior to those of the present-day peoples. Their special senses were much more acute, and they were able to see the midwayers and the angelic hosts, the Melchizedeks, and the fallen Prince Caligastia, who several times came to confer with his noble successor. They retained the ability to see these celestial beings for over one hundred years after the default. These special senses were not so acutely present in their children and tended to diminish with each succeeding generation. "The Adamic children were usually Adjuster indwelt since they all possessed undoubted survival capacity. These superior offspring were not so subject to fear as the children of evolution. So much of fear persists in the present-day races of Urantia because your ancestors received so little of Adam's life plasm, owing to the early miscarriage of the plans for racial physical uplift.   "The body cells of the Material Sons and their progeny are far more resistant to disease than are those of the evolutionary beings indigenous to the planet. The body cells of the native races are akin to the living disease-producing microscopic and ultramicroscopic organisms of the realm. These facts explain why the Urantia peoples must do so much by way of scientific effort to withstand so many physical disorders. You would be far more disease resistant if your races carried more of the Adamic life. "After becoming established in the second garden on the Euphrates, Adam elected to leave behind as much of his life plasm as possible to benefit the world after his death. Accordingly, Eve was made the head of a commission of twelve on race improvement, and before Adam died this commission had selected 1,682 of the highest type of women on Urantia, and these women were impregnated with the Adamic life plasm. Their children all grew up to maturity except 112, so that the world, in this way, was benefited by the addition of 1,570 superior men and women. Though these candidate mothers were selected from all the surrounding tribes and represented most of the races on earth, the majority were chosen from the highest strains of the Nodites, and they constituted the early beginnings of the mighty Andite race. These children were born and reared in the tribal surroundings of their respective mothers." Science "favored microcephalin allele clocked in at 37,000 years ago (with confidence intervals of 14,000 to 60,000 years)." (editorial in Science on microcephalin and ASPN, ASPN gene in Science)  Science 309: 1717 (2005). News of the Week "Are Human Brains Still Evolving? Brain Genes Show Signs of Selection" (Science 309: 1662 (2005).(microcephalin in Science News)