We live in a guarded society. Humanity seems to have adopted fortification on the battlefield and in our homes and cities at an unusual scale. Forming an intrinsic part of positional warfare, urban combat, and modern warfare (from Iraq to Ukraine), the ideas around fortification have been long ignored by research in the national security community. Professor David Betz from King’s College, London talks to Peter about his research and latest publication highlighting the continuities of this fortification zeitgeist across human evolution. The take away is about valuing more our engineers, our CS, our CSS, and our architects. But also in thinking a little more about the values we attribute to risk mitigation. We probably need to think some more about the reasons for failures in liquid modernity too.