The Five Points of Calvinism constitute a summary of soteriology in Reformed Christianity. Named after John Calvin, they largely reflect the teaching of the Canons of Dort. The five points assert that God saves every person upon whom he has mercy, and that his efforts are not frustrated by the unrighteousness or inability of humans. They are occasionally known by the acrostic TULIP: total depravity, unconditional election, limited atonement, irresistible grace, and perseverance of the saints. The five points are popularly said to summarize the Canons of Dort; however, there is no historical relationship between them, and some scholars argue that their language distorts the meaning of the Canons, Calvin's theology, and the theology of 17th-century Calvinistic orthodoxy, particularly in the language of total depravity and limited atonement. The five points were more recently popularized in the 1963 booklet The Five Points of Calvinism Defined, Defended, Documented by David N. Steele and Curtis C. Thomas. The origins of the five points and the acrostic are uncertain, but they appear to be outlined in the Counter Remonstrance of 1611, a lesser-known Reformed reply to the Arminian Five Articles of Remonstrance, which was written prior to the Canons of Dort. The acrostic TULIP was used by Cleland Boyd McAfee as early as circa 1905. An early printed appearance of the acrostic can be found in Loraine Boettner's 1932 book, The Reformed Doctrine of Predestination. English Reformed Baptist theologian John Gill (1697-1771) staunchly defended the five points in his work The Cause of God and Truth. The work was a lengthy counter to contemporary Anglican Arminian priest Daniel Whitby, who had been attacking Calvinist doctrine. Gill goes to great lengths in quoting numerous Church Fathers in an attempt to show that the five points and other Calvinistic ideas were held in early Christianity.