Apart from the "Ramsey Chronicle", medieval sources are hostile to Harthacnut. According to the "Anglo-Saxon Chronicle" he "did nothing worthy of a king as long as he ruled." Modern historians are less dismissive. In the view of M. K. Lawson, he had at least two of the requisites of a successful medieval king, he was "both ruthless and feared"; had he not died young, the Norman Conquest might not have happened. Ian Howard praises Harthacnut for keeping peace throughout his empire, benefiting trade and merchants, and ensuring a peaceful succession by inviting Edward to his court as his heir. Had he lived longer, Howard believes, his character might have enabled him to become a successful king like his father.