Francis August Schaeffer was an American Evangelical Christian theologian, philosopher, and Presbyterian pastor. He is most famous for his writings and his establishment of the L'Abri community in Switzerland. Opposed to theological modernism, Schaeffer promoted a more traditional Protestant faith and a presuppositional approach to Christian apologetics, which he believed would answer the questions of the age. A number of scholars credit Schaeffer's ideas with helping spark the rise of the Christian Right in the United States.

Covenant Theological Seminary has established the Francis A. Schaeffer Institute directed by a former English L'Abri member, Jerram Barrs. The purpose of the school is to train Christians to demonstrate compassionately and defend reasonably what they see as the claims of Christ on all of life.

Schaeffer popularized, in the modern context, a conservative Puritan and Reformed perspective. He is credited with helping spark a return to political activism among Protestant evangelicals and fundamentalists in the late 1970s and early 1980s, especially in relation to the issue of abortion.

Christian Right leaders such as Tim LaHaye have credited Schaeffer for influencing their theological arguments urging political participation by evangelicals. Randall Terry, the founder of Operation Rescue, also acknowledged the influence of Schaeffer.

Francis A. Schaeffer wrote twenty-two books, which cover a range of spiritual issues.

      Francis August Schaeffrer was born in Germantown, Pennsylvania, and became a Christian in 1930 at the age of eighteen, and graduated magna cum laude from Hampden-Sydney College, VA in June, 1935. Schaeffer entered Westminster Theological Seminary in 1935 and transferred to the newly formed Faith Theological Seminary in 1937, graduating from there in 1938.

      Following graduation, he was by some accounts the first person ordained by the Bible Presbyterian Church and became pastor of the Covenant Presbyterian Church in Grove City, PA. In 1941 he was elected moderator of the Great Lakes Presbytery [BPC] and began serving as associate pastor of the Bible Presbyterian Church in Chester, PA. From 1943 to 1947, he pastored First Bible Presbyterian Church in St. Louis, MO, and served as moderator of the Midwest Presbytery [BPC].

      During this time Schaeffer and his wife founded the Children for Christ ministry in St. Louis, which soon became widely adopted by other evangelical churches. In 1947 he traveled throughout Europe as a representative of the Independent Board for Presbyterian Foreign Missions and as the American Secretary for the Foreign Relations Department of the American Council of Christian Churches. In 1948 he moved with his family to Lausanne, Switzerland to begin mission work, and moved the following year to Champery, Switzerland, where he wrote Basic Bible Studies.

      In 1953 he returned to the United States on furlough and began an extensive speaking tour. Later that same year, he returned to Switzerland and moved to Huemoz, Switzerland. By 1955 he had resigned from the mission board and began L'Abri Fellowship, which became the primary focus of his life. In 1971 he received the honorary Doctor of Letters degree from Gordon College, Wenham, MA.

      In 1981 he reedited and pubished The Complete Works of Francis Schaeffer. The Simon Greenleaf School of Law awarded him an honorary Doctor of Laws degree in 1983, but he was forced to return in critical condition from Switzerland to the Mayo Clinic. Despite the debilitating illness, he was able in 1984 to complete The Great Evangelical Disaster and a seminar tour. On May 15, 1984, he died at his home in Rochester, MN and was buried at Oakwood Cemetary in Rochester.