The Marrow Controversy was a Scottish ecclesiastical dispute occasioned by the republication in 1718 of The Marrow of Modern Divinity (originally published in two parts in London in 1645 and 1649 by "E. F.", generally believed to be a pseudonym for Edward Fisher, a lay theologian of the seventeenth century). The work consists of religious dialogues which discuss the doctrine of the atonement and aim to guide the reader safely between Antinomianism and Neonomianism.
In 1700, while making a pastoral visit in the small country parish of Simprin, in the course of his work as a Church of Scotland minister, Thomas Boston saw and borrowed a copy of The Marrow of Modern Divinity. He greatly appreciated the book and while a member of the 1717 General Assembly, commended it to a fellow minister. As a consequence of this conversation, in 1718 arrangements were made to have the Marrow reprinted, with a preface by James Hog of Carnock.
The book displeased those who comprised the majority in the Church of Scotland, who were inclined to the legalism prevalent in the late 17th century. James Hadow, Professor of Divinity and Principal of St. Mary's College in the University of St Andrews, took the lead in opposing The Marrow, assailing it in his opening sermon at the Synod of Fife in April 1719. This was published shortly thereafter as The Record of God and Duty of Faith Therein required. An interchange of pamphlets with Hog ensued, with Hadow accusing the Marrow of the Antinomian heresy and Hog asserting that Hadow was misrepresenting the Marrow.
At the May 1719 General Assembly, an existing "Committee for Purity of Doctrine" was instructed to "enquire into the publishing and spreading of Books and Pamphlets", tending to the spread of doctrines "inconsistent with our Confession of Faith" and to call such authors to account. The committee's report, submitted in May 1720, strongly condemned the book as Antinomian. The Assembly overwhelmingly approved this report, prohibited all ministers of the Church of Scotland from recommending The Marrow in any way, and instructed them to warn their people against reading it. This, of course, had the effect of advertising a previously obscure book to people throughout Scotland and many proceeded to buy a copy and to read it carefully.