When Æthelwulf returned to England, Æthelbald refused to surrender the West Saxon throne, and Æthelwulf agreed to divide the kingdom, taking the east and leaving the west in Æthelbald's hands. On Æthelwulf's death in 858 he left Wessex to Æthelbald and Kent to Æthelberht, but Æthelbald's death only two years later led to the reunification of the kingdom. In the 20th century Æthelwulf's reputation among historians was poor: he was seen as excessively pious and impractical, and his pilgrimage was viewed as a desertion of his duties. Historians in the 21st century see him very differently, as a king who consolidated and extended the power of his dynasty, commanded respect on the continent, and dealt more effectively than most of his contemporaries with Viking attacks. He is regarded as one of the most successful West Saxon kings, who laid the foundations for the success of his son, Alfred the Great.