 He ranks among those authors who believe that the centre of the Rus' Khaganate was Novgorod.According to him, the Christianized Varangians were expelled from the country during the anti-Varangian movement of the 860s or 870s.This movement, associated in the Novgorodian tradition with the name of Vadim the Bold, may have been triggered by the Varangians' attempts to Christianize the pagan populace.