RT Article T1 Extra Ecclesiam Nulla Salus: Lessons for Doctrinal Development Theory in Catholic Theology JF International journal of systematic theology VO 24 IS 1 SP 100 OP 121 A1 Meszaros, Andrew LA English YR 2022 UL https://ixtheo.de/Record/1788631390 AB This article examines the development of the axiom Extra Ecclesiam nulla salus with a view towards drawing certain lessons for doctrinal development theory. The article traces the axiom's development and points to some of the reasons behind it. It then draws on some key passages of John Henry Newman to explain what has been happening during this process of development. Following thereupon, it finally offers some constructive principles for applying development theory today. DO 10.1111/ijst.12520