David Grandy is a retired professor of history and philosophy who grew up in Montpelier, Idaho. From 1968 to 1970 he served a mission for The Church of Jesus Christ of Latter-day Saints in the Central States Mission. Upon graduation from Brigham Young University, he taught English in Japan and then joined the US Army, where he was trained as a Russian linguist. After ten years of active duty, he earned a PhD in the history and philosophy of science from Indiana University. He taught for eight years in the Department of History at BYU–Hawaii and then for seventeen years in the Department of Philosophy at BYU. After his retirement, David and his wife, Janet, served a Church mission in Germany. They are the parents of six children and seventeen grandchildren.