Written as the First World War was finally drawing to a close, A. Clutton-Brock’s reflections on the Kingdom of Heaven examine this challenging theological concept in light of the great religious, political and moral uncertainties thrown up by the conflict. In particular, Clutton-Brock contends that historically Christian orthodoxy has not sufficiently emphasised the role of the Kingdom in salvation, given its importance in the ministry and teaching of Christ. To preserve a religious vision capable of interacting with the modern, industrial world, Christian orthodoxy must carefully consider the scope and importance of political practice, the role of the individual in the realisation of the Kingdom, and the profound implications of reconciling the facts of the universe with the most sincerely held beliefs.