Gregory the Great, whose reign spanned the years between 590 and 604 AD, was one of the most remarkable figures of the early medieval Papacy. Aristocrat, administrator, teacher and scholar, he ascended the throne of St Peter at a time of acute crisis for the Roman Church. Consul of God, first published in 1980, revises the traditional picture of Pope Gregory. It examines how he organized the central administration of the Papacy and his unremitting war on heresy and schism. Gregory also pioneered a new pastoral tradition in learning, promoted monasticism, and trained the episcopate.

There has been a tendency to the view the history of the early medieval papacy predominantly in ideological terms, which has resulted in the over-exaggeration of the idea of the papal monarchy. In this study, first published in 1979, Jeffrey Richards questions this view, arguing that whilst the papacy's power and responsibility grew during the period under discussion, it did so by a series of historical accidents rather than a coherent radical design.