This version takes a little more work than the stinking pile of worn-out racist speculations a popular BYU professor has been peddling. Do the work.
Mormonism’s Negro Doctrine
by Lester Bush
There once was a time, albeit brief, when a “Negro problem” did not exist for the Church of Jesus Christ of Latter-day Saints. During those early months in New York and Ohio no mention was even made of Church attitudes towards blacks. The gospel was for “all nations, kindreds, tongues and peoples,” [1. The injunction was found in many places in the then-recently published Book of Mormon (e.g., I Ne. 19:17; 22:28; 2 Ne. 30:8; Mosiah 27:25; Alma 29:8; 3 Ne. 28:29; similarly, I Ne. 17:35; 2 Ne. 26:26-28, 33; Mosiah 23:7; Alma 26:37), and was reaffirmed in a revelation to Joseph Smith, 9 Feb. 1831, published the following July: "And I give unto you a commandment that ye shall teach them unto all men; for they shall be taught unto all nations, kindreds, tongues and peoples"; Evening and Morning Star, July 1832; presently Doctrine & Covenants 42:58.] and no exceptions were made. A Negro, “Black Pete,” was among the first converts in Ohio, and his story was prominently reported in the local press.[2. Ashtabula Journal, 5 Feb. 1831, and Albany Journal, 16 Feb. 1831. These papers attribute the account to the Painesville Gazette, and Geauga Gazette, respectively.] W. W. Phelps opened a mission to Missouri in July 1831 and preached to “all the families of the earth,” specifically mentioning Negroes among his first audience.[3. Manuscript History of the Church of Jesus Christ of Latter-day Saints, entry undated. Last preceding dated entry was from June 1831, though an intervening reprint from July suggests that the account originated in the latter month.] The following year another black, Elijah Abel, was baptized in Maryland.
Read the whole thing. Really. If you only ever read one Mormon history paper in your life, this should be it.