The Revd George Christopher Stead (9 April 1913 – 28 May 2008) was a British patristic scholar and Church of England clergyman who was the last Ely Professor of Divinity at the University of Cambridge.
His academic career was combined with ministry as a college chaplain and then residentiary Canon of the Ely Cathedral; he also served briefly as Curate of St. John's, Newcastle upon Tyne in 1939.
Stead was particularly interested in the application of the Aristotelian concept of substance (ousia) to Christian theology and in the use of the term 'homoousios', initially in a context deemed heretical (in the teaching of Paul of Samosata) by the Council of Antioch (AD 268), subsequently more authoritatively by the Council of Nicaea (AD 325), which in turn gave rise to over half a century of heated discussion.
Stead's interest (taking in en route Marius Victorinus and Gregory of Nyssa) extended to Augustine and John Philoponus' use of the concept.
He also wrote on Athanasius, Gregory of Nyssa, and Valentinian Gnosticism, as well as on general philosophical issues such as the freedom of the will and concept of mind in the Church Fathers.