Lucas McMahon

@chrysoboullon.bsky.social

PhD Princeton. The logic and logistics of empire. Foreign affairs, information security, and digital spatial history. Long Roman Empire, sometimes even the Komnenoi. British Academy International Postdoctoral Fellow @ University of Exeter. 🇨🇦

One of my favourite historical moments took place on 5 November 869 when Peter the Monk from Rome was called before the Fourth Council of Constantinople for signing Photios' documents and his defense is, "What, me? There are lots of monks named Peter from Rome. Could have been anyone, really."

Pretty amazing to see The Guardian reporting on my article winning the Medieval Academy of America's Article Prize in Critical Race Studies and on medieval chess' potential to reveal a vision of equality and mutual respect! Link in the first comment.

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The whole meeting is actually just a black screen and then some prof at retirement age who got their job decades ago with the promise of a 4-page article in a local bulletin comes on and tells you everything is fine and to keep on trying.

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I know that I'm one of those digital humanities scholars, but I have zero faith in digital archiving or computers being a way to preserve information over the long term. If Cambridge(!) can't keep Richard Talbert's Tabula Peutingeriana thing alive, what hope does anything else have?

I keep hearing that the Iranian regime's grip is weak, but the lesson from Justinian is that if you tell the security forces to murder the people who complain about you and they do it, maybe you're really not all that weak?

Empires are only as strong as their communication systems. If you're curious how the Romans in the ninth century operated a telegraph that sent messages across 700km from the frontier to Constantinople, the first part of my work on this is now on the Exeter Medieval Studies blog. Link in next post

How to write historical GIS: a: include the minimum technical detail that an expert needs to reproduce your work. Non-GIS reviewers complain it's not detailed enough b: fill 20pp explaining how everything works in detail. No space left for historical argumentation. Reviewers complain it's too long

look, if we don't stand up for Canada Post, governments of the future will claim transit organizations need to be profitable, and hospitals need to be profitable, and schools need to be profitable, and they'll chop up as much of the public trust as they can and sell it to their friends for nothing.

Somewhere in the Pentagon right now a nameless logistics officer is furiously calculating how many overflowing port-a-potties fit in a C-5 in case Greenland is invaded and Germany decides to turn off the water and power at Ramstein. It will be the most emblematic airlift of our times.

Wild medieval saints! 🔥🔥🔥 Dragons and miraculously sprouting cherry twigs. An evil walnut tree growing above the tomb of Nero. For these and much more in my book, 'The Sons of St Augustine' (OUP), I am delighted to share the wonderful media release that Cambridge published this morning:

Dragon-slaying saints performed green-fingered medieval miracles, new study reveals

Pope Leo XIV's Augustinian order once performed green-fingered, dragon-slaying miracles. Dr Krisztina Ilko rediscovers their lives and wild power base

cam.ac.uk