Video Description

Modern societies tend to assume that social outcomes reflect individual intentions — that if people act rationally, pursue happiness, and maximise opportunity, the system as a whole will remain stable. In this lecture, Jiang Xueqin questions that assumption. Jiang argues that societies are not held together by intentions, but by incentives. Drawing on game theory, he shows how systems can reward behaviour that is individually rational yet collectively destructive. When incentives are misaligned, collapse does not require malice, ignorance, or moral failure — it emerges naturally from the rules of the game. Using modern dating as a central example, Jiang explains how status competition has replaced survival and reproduction as the primary organising principle of social life. He examines how rational choices in the dating market — delaying commitment, maximising options, and optimising for visibility and status — produce outcomes that undermine long-term social continuity. What appears sensible at the individual level leads, at scale, to fertility collapse, social fragmentation, and civilisational decline. Rather than treating dating as a cultural or moral issue, Jiang situates it within a broader structural framework. He connects individual behaviour to historical patterns of civilizational collapse, arguing that when a society systematically selects against its own reproduction, it has already entered a late stage of decline. The lecture explores why governments struggle to reverse these trends, why policy interventions often fail, and why systems built on short-term optimisation are structurally incapable of sustaining themselves over time. 🎓 Lecturer: Professor Jiang Xueqin 📅 Recorded: 2025 📖 Full Lecture: https://www.youtube.com/watch?v=hE4l9WyLF3U&t=2207s ⚖️ Educational & Copyright Disclaimer This video is presented for educational and informational purposes. It contains edited excerpts from a publicly available lecture, transformed to foreground key structural and philosophical arguments. All rights to the original lecture remain with the original creator. Lecture Hall curates and contextualises academic work to make serious ideas accessible to a wider audience. #GameTheory #Dating #Society #Collapse #Incentives #Civilization #LectureHall #JiangXueqin