Right. We've done No Islam, no Christianity, no Judaism, no Zoroastrianism, no Buddhism, Hinduism, ect, ect. But what about Mormonism? I don't care how it doesn't happen, either Joseph doesn't write the book or he doesn't find the tablets(and no one ever does, for that matter). In this case, the "Why" does not matter. Just that in 1829, there is no LDS church founded.
How different is the world? Does it effect anything substantial other than Utah and American social politics?