As the story goes, the plat plan appeared to Smith while he was studying Enoch, an Old Testament prophet who designed a city so perfect it was whisked off to heaven. The text accompanying the blueprint, written out by Smith and his comrades, says each plat should house 15,000 to 20,000 people within one square mile (though the definition of a mile has changed slightly), and that the design should be replicated worldwide.
CHAPTER IX — MORMONISM: ITS ORIGIN, CHARACTERISTICS, AND DOCTRINES
BY REV. R. G. MCNIECE, D. D., FOR TWENTY YEARS PRIOR TO 1897, PASTOR OF FIRST PRESBYTERIAN CHURCH, SALT LAKE CITY, UTAH
The writer has lived in Salt Lake City, the official headquarters of Mormonism, for over thirty years, and he has improved the opportunity to secure a complete understanding of the system. In the great Tabernacle in Salt Lake City, during a whole generation, he has heard Mormonism expounded and defended, again and again, by its chief officials—by President Brigham Young, and President John Taylor, and their successors, Wilford Woodruff, Lorenzo Snow, and Joseph F. Smith. In various Mormon meeting-houses, also, from Idaho to Arizona, he has heard the system set forth by many of its chief apostles, bishops, and elders.