Semipelagianism is a Christian theological and soteriological school of thought on salvation; that is, the means by which humanity and God are restored to a right relationship. Semipelagian thought stands in contrast to the earlier Pelagian teaching about salvation (in which man is seen as effecting his own salvation), which had been dismissed as heresy. Semipelagianism in its original form was developed as a compromise between Pelagianism and the teaching of Church Fathers such as Saint Augustine, who taught that man cannot come to God without the grace of God. In Semipelagian thought, therefore, a distinction is made between the beginning of faith and the increase of faith. Semipelagian thought teaches that the latter half - growing in faith - is the work of God, while the beginning of faith is an act of free will, with grace supervening only later. It too was labeled heresy by the Western Church in the Second Council of Orange in 529.
The Roman Catholic Church condemns semipelagianism but affirms that the beginning of faith involves an act of free will. It teaches that the initiative comes from God, but requires free synergy (collaboration) on the part of man: "God has freely chosen to associate man with the work of his grace. The fatherly action of God is first on his own initiative, and then follows man's free acting through his collaboration". "Since the initiative belongs to God in the order of grace, no one can merit the initial grace of forgiveness and justification, at the beginning of conversion. Moved by the Holy Spirit and by charity, we can then merit for ourselves and for others the graces needed for our sanctification, for the increase of grace and charity, and for the attainment of eternal life."
The term Semipelagian is used retrospectively by theologians to refer to the original formulation, and has been used as an accusation in theological disputes over salvation, divine grace and free will.
Pelagian and Semipelagian theology 
Pelagianism is the teaching that man has the capacity to seek God in and of himself apart from any movement of God or the Holy Spirit, and therefore that salvation is effected by man's efforts. The doctrine takes its name from Pelagius, a British monk who was accused of developing the doctrine (he himself appears to have claimed that man does not do good apart from grace in his letters, claiming only that all men have free will by God's gift); it was opposed especially by Augustine of Hippo and was declared a heresy by Pope Zosimus in 418. Denying the existence of original sin, it teaches that man is in himself and by nature capable of choosing good.
In Semipelagian thought, man doesn’t have such an unrestrained capacity, but man and God could cooperate to a certain degree in this salvation effort: man can (unaided by grace) make the first move toward God, and God then increases and guards that faith, completing the work of salvation. This teaching is distinct from the traditional patristic doctrine of synergeia, in which the process of salvation is cooperation between God and man from start to finish.
Semipelagianism in the patristic era 
After this confusion had been deemed an error, the term Semipelagianism was retained in learned circles as a designation for the heresy advocated by monks of Southern Gaul at and around Marseille after 428. It aimed at a compromise between the two extremes of Pelagianism and Augustinism, and was condemned as heresy at the local Council of Orange (529) after disputes extending over more than a hundred years; the term Semipelagianism itself was unknown in antiquity.
Development of the term and subsequent use 
Early use of the term 
The Epitome of the Lutheran Formula of Concord (1577) rejects "the false dogma of the Semi-Pelagians, who teach that man by his own powers can commence his conversion, but can not fully accomplish it without the grace of the Holy Spirit."
Eastern Orthodoxy 
The Eastern Orthodox Church generally adheres to the doctrine of theosis in its conception of salvation as a process of personal transformation to the likeness of God in Christ. Theosis closely links the ideas of justification and sanctification; salvation is achieved by the divinisation of man. This doctrine is sometimes labeled Semipelagian by theologians of the historic Protestant traditions on the grounds that it suggests that man contributes to his own salvation. The accusation is rejected by the Eastern Orthodox, which unlike these Western traditions was relatively uninfluenced by Augustine and holds that "for the regenerated to do spiritual good – for the works of the believer being contributory to salvation and wrought by supernatural grace are properly called spiritual – it is necessary that he be guided and prevented [preceded] by grace … Consequently he is not able of himself to do any work worthy of a Christian life".
John Cassian, known particularly for his teachings on theosis, is considered to be a Saint in the Eastern Church as well as in Roman Catholicism. He is generally considered to have been an early proponent of semi-Pelagianism But some recent scholars deny that his views were in fact semi-Pelagian. Lauren Pristas writes: "For Cassian, salvation is, from beginning to end, the effect of God's grace. It is fully divine." Augustine Casiday states that Cassian "baldly asserts that God's grace, not human free will, is responsible for 'everything which pertains to salvation' - even faith." Others hold that "the view of Cassian as the ringleader of 'semi-Pelagianism' rests on a conjectural chronology". The Roman Catholic Church includes John Cassian in its official list of recognized saints, with a feastday on 23 July, and cites him in the Catechism of the Catholic Church. It did not endorse Augustine entirely and, while later Catholic theologians accepted Augustine's authority, they interpreted his views in the light of writers such as Cassian. West and East consider both John Cassian and Augustine of Hippo as saints.
Calvinism and Arminianism 
In more recent times, the word has been used in the Reformed Protestant camp to designate anyone who deviates from what they see as the Augustinian doctrines of sovereignty, original sin, and grace, most notably Arminian Protestants and Roman Catholics. Although Calvinist and Lutheran theologies of salvation differ significantly on issues such as the nature of predestination and the salvific role of the sacraments (see means of grace), both branches of historic Protestantism claim the theology of Augustine as a principal influence.
Many Arminians have disagreed with this generalization, believing it is libelous to Jacobus Arminius (from whose name Arminianism derives) and the Remonstrants who maintained his "Arminian" views after his death. John Wesley (an Anglican defender of Arminianism and founder of Methodism) and other prominent classical and Wesleyan Arminians maintained the doctrines of original sin and the total depravity of the human race. Likewise, ever since the Council of Orange (529), the Catholic Church has condemned Semipelagianism and has not accepted the Calvinist interpretation of Augustine.
Jansenism and the Jesuits 
In the 18th century, the Jesuits accused the Jansenists of affirming the radical Augustinian doctrines of Calvinism; the Jansenists, in turn, accused the Jesuits of Semipelagianism. The 1713 papal bull of Pope Clement XI, Unigenitus, in declaring Jansenism heretical, upheld the Jesuits' objections.
- The Oxford Dictionary of the Christian Church, (Oxford University Press 2005 ISBN 978-0-19-280290-3), article Semipelagianism
- Catechism of the Catholic Church 2008
- Catechism of the Catholic Church 2010
- Adams, Nicholas (2007). "Pelagianism: Can people be saved by their own efforts?". In Quash, Ben; Ward, Michael. Heresies and How to Avoid Them. London: SPCK Publishing. p. 91. ISBN 978-0-281-05843-3.
- "Semipelagianism". Catholic Encyclopedia. New York: Robert Appleton Company. 1913.
- Article II. Of Free Will. Negative III
- Joseph Pohle, "Semipelagianism" in Catholic Encyclopedia 1912
- Horton, Michael (2004). "Are Eastern Orthodoxy and Evangelicalism compatible? No". In James Stamoolis. Three Views on Eastern Orthodoxy and Evangelicalism. Grand Rapids: Zondervan. pp. 139–140. ISBN 0-310-23539-1.
- Confession of Dositheus, Decree 14
- Encyclopaedia Britannica: Saint John Cassian
- Christian Classics Ethereal Library
- Richard Lischer, The Company of Preachers (Eerdmans 2002 ISBN 0-8028-4609-2), p. 182
- William W. Kibler, Medieval France (Garland Reference Library of the Humanities 1995 ISBN 0-824-04444-4), p. 180
- Lauren Pristas (1993), The Theological Anthropology of John Cassian, PhD dissertation, Boston College, OCLC 39451854
- Augustine Casiday, Tradition and Theology in St John Cassian (Oxford University Press 2007 ISBN 0-19-929718-5), p. 103
- Allan D. Fitzgerald (Eerdmans 1999 ISBN 0-8028-3843-X), p. 763
- Martyrologium Romanum (Libreria Editrice Vaticana 2001 ISBN 88-209-7210-7), p. 385
- Catechism of the Catholic Church, 2785
- Edwin Zackrison, In the Loins of Adam (iUniverse 2004 ISBN 9780595307166), p. 73
- Justo L. González, A History of Christian Thought (Abingdon Press 2010 ISBN 9781426721915), vol. 2, p. 58
- James Akin, "A Tiptoe through TULIP"
- Robert A. Maryks, Saint Cicero and the Jesuits (Ashgate Publishing 2008 ISBN 978-0-7546-6293-8), p. 130
- Orlando O. Espín, James B. Nickoloff, An Introductory Dictionary of Theology and Religious Studies (Liturgical Press 2007 ISBN 978-0-8146-5856-7), p. 664
See also 
- Augustine of Hippo
- Christian heresy
- Grace (Christianity)
- Irresistible grace
- Original sin
- Prevenient grace
- Sola gratia
- Synergism and monergism