This essay is in audio.
Here is the lecture on The Age of Empires and Search For Survival by John Glubb in case you want to share it on your site. Also two very well read audio versions. The first is a reading of the lecture, the second is a follow up lecture “Search For Survival”. The text to the second lecture can be found just over half way down the HTML page.
Search For Survival – Sir John Glubb audio essay
Pdf and website