Turretin is especially known as a zealous opponent of the theology of Saumur (embodied by Moses Amyraut, and called Amyraldism), as an earnest defender of the Calvinistic orthodoxy represented by the Synod of Dort, and as one of the authors of the Helvetic Consensus, which defended the formulation of double predestination from the Synod of Dort and the verbal inspiration of the Bible. Among his writings, which are chiefly dogmatic in character, special mention should be made of his Institutio Thelogiae Elencticae (3 parts, Geneva, 1679-1685), which is a dogmatic theology written in a polemic fashion and which became a standard text in Reformed Christian circles until it was replaced by Charles Hodge's Systematic Theology in the late 19th century.
Turretin greatly influenced the Puritans, but today, he is a mostly forgotten Protestant scholastic from the annals of church history, though the rough English translation of his Institutes of Elenctic Theology is still read by students of theology. John Gerstner called Turretin "the most precise theologian in the Calvinistic tradition." - Theopedia