5 ideas
Each person has a threshold, the share of public opposition they must see before they will voice their own. When a few low-threshold individuals speak out, they push public opposition past the thresholds of others, and a chain reaction can flip a society from apparent unanimity to open revolt. Tiny changes in the distribution of thresholds can decide whether a cascade stalls or sweeps everything.
Because people conceal their true preferences and their thresholds, neither rulers, observers, nor dissidents themselves can gauge how close a regime is to collapse. Stable-looking systems can therefore fall with no warning, and afterward everyone claims it was inevitable. This hindsight illusion arises because private discontent only becomes visible once it is safe to reveal.
Preference falsification distorts not only what people say but, over time, what they know. Public debate shapes how people form beliefs, so when dissenting arguments go unspoken, later generations lose access to them. Knowledge falsification therefore narrows the range of ideas people can even imagine, and an imposed orthodoxy can come to be sincerely believed.
Communist regimes in East Germany, Czechoslovakia, and elsewhere appeared entrenched until 1989, when small protests snowballed within weeks into mass uprisings that toppled them. Western experts, Soviet officials, and even the dissidents failed to predict it. Once people saw others defying the regime, long-suppressed opposition surfaced all at once, which shows the threshold cascade and why concealed discontent hid the regime's fragility.
Treat expressed consensus, whether in polls, votes, or public statements, as the result of social incentives rather than a readout of what people actually believe. Under this lens, apparent unanimity often signals high costs of dissent, not genuine agreement. Unpopular norms such as caste practices or affirmative-action orthodoxy can persist precisely because everyone assumes everyone else supports them.