Christian universalism was a theology prevalent in the early United States coinciding with the founding of the Latter Day Saint movement (also known as Mormonism) in 1830. Universalists believed that God would save all of humanity. Universalism peaked in popularity during the 1820s and 1830s, and the idea of universal salvation for all humanity was hotly debated. Several revelations of the founder of the Latter Day Saint movement, Joseph Smith, dealt with issues regarding Universalism, and it was a prominent heresy in the Book of Mormon. Smith's father was a Universalist, while his mother was a traditional Calvinist, creating strain in the Smith family home.