This is an unlisted video of a lecture given in November 2022. It continues to cover the disasters of the seventh century, but also how the Byzantine Emperors overcame every challenge by a process of internal reform. It is unlisted, unlike the other lectures on this site, because it will eventually be edited into a series for publication elsewhere. If you have enjoyed this lecture, its author might enjoy a bag of coffee, or some other little token of esteem: https://www.amazon.co.uk/hz/wishlist/…