The nature of kingship changed considerably during the centuries of Pictish history. While earlier kings had to be successful war leaders to maintain their authority, kingship became rather less personalised and more institutionalised during this time. Bureaucratic kingship was still far in the future when Pictland became Alba, but the support of the church, and the apparent ability of a small number of families to control the kingship for much of the period from the later 7th century onwards, provided a considerable degree of continuity. In much the same period, the Picts' neighbours in Dál Riata and Northumbria faced considerable difficulties, as the stability of succession and rule that previously benefited them ended.