This book has a lot of weaknesses. As of this writing, it is over 50 years old, and many of the "modern works" cited date from when the Ottoman Empire still existed. The author makes a number of unusual writing choices - at times he references "the Arab caliphate" - you know, the one-and-only! On page 58 there is a rather long and unusual description of the Sultan's physical features: "He was handsome, of middle height but strongly built. He face was dominated by a pair of piercing eyes, under arched eyebrows, and a thin hooked nose that curved over a mouth with full red lips. In later life his features reminded men of a parrot about to eat ripe cherries." My personal favorite is from page 78, describing a cannon-ball fired from one of the Sultan's guns: "The length of its barrel was 40 spans, that is, 26 ft and 8 in. The reverberation was heard for a hundred stadia, and the ball hurtled itself in the air for a mile, then buried itself 6 ft deep in the earth." Ah, yes, because we all know how long a stadium is!
Steven Runciman is writing History with a capital H, and is completly allergic to things like explanations, or citations, or actually quoting primary sources. On pages 128 and 130 he describes the Sultan's and the Emperor's rallying speeches to their men on the day of the last battle - it would have been nice if either of those page-long parphrases had been replaced with the actual speeches, or at least quotes. On page 79 the author writes about the omens surrounding a possible conquest of Constantinople, with quotes taken from "the Tradition" of Islam - you know, hadiths have actual citations too, Sir Runciman. On page 75 the author almost approaches something resembling historical methodology by talking about the different figures given for the size of the Turkish army - but then declares the (unnamed and uncited) Italian accounts more reliable with no explanation whatsoever.
The most egregious example is from pages 20 and 21, where the author explains why many Greeks were reluctant to accept Union with Rome. "But there were many thoughtful statesmen who also doubted the benefits of union. Many calculated, with reason, that the West would never be willing or able to send help . . . A few statesmen looked further ahead. Byzantium . . . was doomed. The only chance of reuniting the Greek Church and with the Greek people might well like in accepting Turkish bondage . . . Only thus might it be possible to reconstitute the Orthodox Greek nation and so revive it that in time it might regain enough strength to throw off the infidel yoke and recreate Byzantium. Greek integrity might well be better preserved by a united people under Moslem rule than by a fragment attached to the rim of the Western world."
This is an absolutely fascinating argument. But who the hell are these thoughtful statesmen? Sir Runciman never bothers to cite them, never bothers to name his sources, never even bothers to name the apparently numerous people who had the foresight to predict the Greek Independence War and the Megali Idea centuries in the future. I have no idea if what he is saying has any basis in the contemporary reality or if it is just the imposition of a 20th century Byzantine fanboy because a Cambridge historian places no value on actually producing evidence for anything that he says.
So if I have so many criticisms, why do I give the book 4 stars? My praise is short and simple - the writing is good. This might be deeply flawed historical method, but it is accurate enough, and is utterly brilliant writing. I will read this book again, because Runciman's History with a capital H is a first-rate story. If you are totally new to Byzantine history, do not start with this book because you will be unable to piece apart all the unexplained bits that Runciman loves. But if you have a passing familiarity with the context and want to read an awesome book about political drama, treason and betrayal, naval battles, desperate sieges, huge walls, Greek fire, and 1000-lb cannon balls, give this book a shot.