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Primary sources/Evolution/McKay Letter 1959
February 3, 1959
David O. McKay, President
...The Church has issued no official statement on the subject of the theory of evolution. Neither "Man, His Origin and Destiny" by Elder Joseph Fielding Smith, nor "Mormon Doctrine" by Elder Bruce R. McConkie, is an official publication of the Church.
Evolution is a theory. You say that biologists would agree on the general lines of what happened, although there may be less agreement about just how it happened. While scientific people themselves differ in their interpretations and views of the theory, any conflicts which may seem to exist between the theory and the truths of revealed religion can well be dealt with by suspending judgment as long as may be necessary to arrive at facts and at a complete understanding of the truth.