Every civilisation tells itself it will last forever. History suggests otherwise. Does it feel like the machinery of the world is grinding to a halt? That institutions are becoming more expensive but less capable? That the future has shrunk? You are not imagining it. You are witnessing Structural Entropy . In Decline , JP Salomon argues that the West has reached the "Seneca Cliff"—the mathematical tipping point where complex systems, having exhausted their energy and trust, collapse far faster than they were built. This is not a manifesto about Left versus Right. The fractures described here cut deeper than politics: Insolvent Complexity: Why we can no longer afford the bureaucracy we built. - Demographic Inversion: The silent mathematical trap of an aging world. - Elite Overproduction: Why the ruling class is at war with itself. - The Behavioural Sink: The retreat from human connection into the digital void. Civilisations do not die because they are conquered. They die because they dissolve from within.