The talk is in three parts: the hexayurt story (with a bit more about materials science than I usually do), followed by tug-of-war trying to break a nanomaterial cable (“string”) and a discussion of modern materials technology, followed by a frank examination of Snowden’s likely long-term impact on US and global foreign policy.
People liked the talk a lot. I’m glad people have found this angle useful.
Here are Amazon links for the various pieces of technology I was discussing in the talk: UK and US. I also mention the biolite stove. There are a few more odds-and-ends on my design tumblr, A Fine Consideration.