John MacArthur (b. 1939–d. 2025) was a Calvinist theologian, author, editor, and teacher. He was a popular conference speaker and the president of both The Master's College and The Master's Seminary. He also served as pastor-teacher of Grace Community Church in Sun Valley, California since 1969. Best known for his expository exegesis of the Bible, Logos has collected more than 3,000 of his sermons in the John MacArthur Sermon Archive and offers the complete MacArthur New Testament Commentary.

MacArthur’s pulpit ministry extended around the globe through his media ministry, Grace to You. In addition to producing daily radio programs for nearly 2,000 English and Spanish radio outlets worldwide, Grace to You distributed books, software, and CDs by John MacArthur. He wrote hundreds of books and study guides, including the bestselling John MacArthur Essential Bible Study Library and the MacArthur Study Bible. He was also the author of notable titles like Different by Design and Twelve Ordinary Men.