Rational Theology: As Taught by the Church of Jesus Christ of Latter-day Saints

Widtsoe's influential LDS Melchizedek priesthood manual (later released as a book), Rational Theology, underscored his and other Mormon leader's positivist assumptions about the world — that science was good, that Mormonism would be proven true, and that society would be perfected. Although his other church writings proved to be equally important, none so thoroughly summarized his embrace of science and Mormonism as Rational Theology.