Topic 11.1 was about power — including the deepest kind, which keeps grievances off the agenda so quietly that no one even fights (11.1.1, 11.1.3). This topic is about the opposite event: the moment people force a grievance onto the agenda, against power that worked to keep it off. It is about social movements — the great collective attempts by ordinary people, acting outside the normal channels, to change how things are.
And it opens with a puzzle that sounds simple and turns out to be one of the hardest in the discipline, a puzzle that quietly demolished the first theories anyone offered. The puzzle is timing. Not "why do people revolt?" but "why do they revolt then — in that particular year, and not in the fifty years of the same suffering before it? "
The grievance that waited three hundred years.
Consider almost any great movement, and lay its grievance next to its rising. People were enslaved, or denied the vote, or worked to exhaustion in unsafe factories, or ruled by a distant empire — and they endured it, often, for generations. The injustice did not appear the year the movement did. It was there the year before, and the decade before, and sometimes the century before, borne by parents and grandparents who did not rise.
And then, in one particular period, they rose. The American civil rights movement exploded in the 1950s and 60s — but the injustice it fought was centuries old and had been, by many brutal measures, worse in earlier decades. The suffrage movements, the independence movements, the labour movements: in case after case, the grievance was old and roughly constant, and the movement was sudden and dated.
This is the fact that breaks the obvious theory. The obvious theory says: people revolt because they are suffering, so more suffering means more revolt. But if that were true, movements would peak when misery peaks — and they do not. They often erupt when things are improving , among people whose grievance, though real and deep, is no worse than it was in the quiet years before. So suffering cannot be the trigger, because the suffering was already there and nothing happened. Something else must vary — something that was absent in all the quiet years and present in the loud one. Finding that something is the whole project of the modern study of movements.
First, the plain-words definition
Before the puzzle, let us be clear about what we are even talking about, because "social movement" is used loosely for everything from a hashtag to a revolution.
A social movement is a sustained, organised, collective effort by people acting outside the routine channels of politics to bring about (or resist) social change , on the basis of a shared sense of grievance and a shared identity .
Take the parts:
Sustained — not a single riot or a one-day march, but an effort that persists over time. A movement has a past and a future, not just a moment.Organised — it has some structure: networks, groups, leaders, ways of coordinating. It is not a random crowd.Collective — it is many people acting together, and understanding themselves as acting together.Outside routine channels — this is what makes it a movement rather than ordinary politics. It uses marches, strikes, boycotts, sit-ins, occupations — extra-institutional means — because the routine channels are closed to it or too slow. (When it wins and moves inside the channels, becoming a party or a lobby, it is on its way to ceasing to be a movement.)For or against change — movements can push for change or fight to prevent it. A counter-movement resisting a change is just as much a social movement as the one demanding it.Shared grievance and identity — the members feel a common wrong and, crucially, a common we (the "we" of 6-territory identity, and the class-for -itself leap of 8.1.3). Without the shared we , you have scattered individuals with similar complaints, not a movement. Hold that last element especially, because it will return. A movement is not made by a grievance alone. It is made by a grievance plus a "we" plus the means to act — and it is the second and third of those, not the first, that turn out to vary.
The theories that failed: the "they're just upset" family
The earliest explanations of movements shared a common shape, and a common flaw, and seeing the flaw clearly is worth more than memorising the theories.
The early theories treated movements as eruptions of grievance — as what happens when strain, frustration, or misery builds past a breaking point. Three versions:
Collective behaviour / "the mob." The oldest view treated crowds and movements as irrational — as contagions of emotion in which the individual loses judgement and is swept along. Movements, on this view, are a kind of social fever: a breakdown of normal order, driven by feeling rather than reason. (Notice how convenient this view is for the powerful — it makes every protest a symptom of disorder rather than a claim with content.)
Mass society. A later version: movements arise among the rootless and isolated — people cut loose from stable communities by rapid change, who latch onto movements to fill the void. The lonely and dislocated, hungry for belonging, are mobilised by demagogues.
Relative deprivation. The most sophisticated of the family: people revolt not when they are absolutely worst off but when there is a gap between what they have and what they feel entitled to expect — especially when rising expectations outrun improving conditions (the "J-curve": things get better, expectations get better faster, the gap opens, and revolt follows). This one is genuinely insightful and partly survives — it helps explain why revolt often comes amid improvement , not misery.
Why the whole family falls short — the constant that cannot explain a variable.
Here is the decisive objection, and it is a piece of pure logical hygiene worth keeping for life. Grievance, strain, deprivation, and frustration are almost always present in an aggrieved population — they are roughly constant. But movements are rare and dated — they are highly variable. And a near-constant cannot explain a variable. If the grievance was there all fifty quiet years and also in the one loud year, then the grievance cannot be what made the loud year loud. Something that changed must be responsible — and by definition the grievance, which was there all along, is not it.
Relative deprivation partly escapes this, because the gap it names can genuinely open and close (rising expectations do change). But even it cannot explain the organisational facts: why this aggrieved group mobilised and that equally deprived one did not, why movements cluster in particular times and places, why they need networks and resources and leaders that some groups have and others lack. The grievance theories were looking at the fuel and ignoring the spark, the oxygen, and the people who built the fire. Fuel is everywhere. The question is what lets it catch — and that is never the fuel.
The turn that founded the modern field: it's not grievance, it's capacity
In the 1970s the study of movements turned over, and the turn is one of the most productive reversals in the discipline. It said, in effect: stop asking why people are aggrieved — they nearly always are. Start asking what makes it possible for the aggrieved to act . Two linked answers followed, and together they replaced the grievance family.
Resource mobilisation theory — movements run on resources, not just anger.
Grievances are constant; what varies is the capacity to organise . A movement needs resources — money, time, skills, communication networks, meeting places, experienced organisers, media attention — and these are distributed unequally and change over time. When a group gains resources (a new source of funds, a network of churches, a cadre of trained organisers, a sympathetic press), it can suddenly act on a grievance it always had.
This reframes everything. The civil rights movement did not erupt because Southern Black Americans became more aggrieved in the 1950s — they had been grievously wronged for centuries. It erupted, on this account, in part because resources had accumulated : the Black church as an independent institutional base with buildings, money, and leaders; historically Black colleges producing organisers; migration and the vote in the North creating leverage; television bringing images to a national audience. The grievance was old; the organisational capacity was new — and the movement dated to the capacity, not the grievance. (Note the sharp break from the "mob" theories: movements are not eruptions of the disorganised and rootless but achievements of the well-networked — the opposite prediction, and the evidence favours it.)
Political opportunity / political process theory — the door has to open.
Resources are not enough; the political environment has to give the movement an opening. Movements surge when the structure of political opportunities shifts in their favour — when the authorities divide among themselves, when powerful allies appear, when the costs of repression rise, when elections or crises make the powerful newly responsive, when a regime's grip loosens. The same movement with the same resources may fail in a closed system and succeed when the system cracks open.
This explains the timing the grievance theories could not. A movement rises not merely when people are angry (always) or even when they are organised (necessary) but when a door opens — when the political opportunity structure shifts so that action, previously futile or suicidal, suddenly has a chance. Revolutions cluster in moments of state weakness — lost wars, fiscal crises, elite splits — not because grievance spiked but because the opportunity did . And note the tie to the previous topic: an opening opportunity is precisely the second face of power (11.1.3) weakening — the agenda-control that kept the issue off the table failing, so that what was unthinkable becomes, suddenly, raisable.
Putting it together: the three ingredients
So the modern answer to "why then?" is not one thing but the conjunction of three, and the conjunction is why movements are rare: all three must be present at once.
A movement emerges when:
Grievance — a shared sense of wrong (nearly always present; the fuel).Mobilising capacity — resources, networks, organisation, a shared identity that turns "I suffer" into "we are wronged and we can act" (variable; the thing that must be built).Political opportunity — an opening in the political environment that makes action feasible rather than futile (variable; the door that must open). Grievance alone gets you sullen endurance. Grievance plus capacity, with the door shut, gets you an organised movement that is crushed or waits. Grievance plus an open door, with no capacity, gets you a riot that flares and dies. Only when all three coincide do you get a sustained movement with a chance to win — which is exactly why the same grievance can sit quiet for generations and then, when capacity has grown and a door has opened, rise seemingly overnight.
Why the bus boycott worked in 1955 and not 1935.
The refusal of Black passengers in Montgomery to ride segregated buses is often told as a story that began when one woman refused to give up her seat. But run the three ingredients and you see why 1955 and not any of the identical years before.
Grievance : unchanged. Segregation on the buses had humiliated riders for decades. The wrong was not new; by that measure it was old and constant.Capacity : this had grown. There was now a dense network — churches with buildings and money and a trained ministry, established civic organisations, a pool of experienced organisers, and a community tight enough that a boycott could be coordinated and sustained for over a year. And the person whose refusal sparked it was not a random passenger but a trained activist embedded in that network — capacity, not accident.Opportunity : this had shifted. National politics had turned somewhat more responsive; the courts were newly open to challenges to segregation; and crucially, television now carried images of the response to a national audience whose reaction raised the cost of open repression — a change in the political environment, not in the grievance. Same wrong, new capacity, open door. The story that begins and ends with one brave refusal misses everything that made the refusal catch — and it was the catching, not the refusal, that was rare. Brave individual refusals had happened for years and gone nowhere. What was different in 1955 was everything around the refusal.
Why this matters
Because you will spend your life watching movements rise and fall — and being told, by whoever benefits from the telling, what they mean . The powerful whom a movement challenges will reach for the oldest theory in the book: these people are just upset, irrational, a mob, stirred up by outsiders, a disorder to be managed. That framing is not an analysis; it is a move in the fight — the "collective behaviour" theory pressed into service to delegitimise a claim by treating it as a symptom. Knowing that grievance is nearly always present strips that framing of its force : the interesting question is never "why are they upset?" (they always had reason) but "why now, and what changed?" — and the answer is usually organisation and opportunity, not a sudden outbreak of feeling.
And it cuts the other way too, against the movement's romance . Sympathisers like to tell the story as a moral awakening — the moment people finally saw the injustice and rose. But the injustice was visible all along; what changed was rarely a sudden moral clarity and usually the boring, essential things: money, networks, trained organisers, an open door. This is not cynicism; it is respect. It credits movements not to a mysterious spasm of righteousness but to years of patient, unglamorous building — the church basements, the mailing lists, the training sessions, the coalition-tending — that the dramatic story erases. The people who made the movement were mostly not on the barricades on the famous day. They were building capacity in the quiet years, so that when the door opened, someone was ready to walk through.
The next lesson (11.2.2) takes the inside of this — once a movement exists, how does it actually recruit, hold, and move people? Why do individuals join at all, when the smart, selfish move is to stay home and let others take the risks? That is the free-rider puzzle, and it is where the study of movements meets the hard logic of collective action.
Social movement — a sustained, organised, collective effort by people acting outside routine political channels to bring about or resist social change, grounded in a shared grievance and a shared identity.
The timing puzzle — the observation that grievances are old and roughly constant while movements are rare and dated, so grievance alone cannot explain when a movement emerges.
Relative deprivation — the theory that revolt springs from the gap between what people have and what they feel entitled to expect, not from absolute misery; often sharpest when rising expectations outrun improving conditions (the J-curve).
Resource mobilisation theory — the view that movements arise not from rising grievance but from rising capacity to organise : money, time, skills, networks, leaders, and media, which are unequally distributed and change over time.
Political opportunity (political process) theory — the view that movements surge when the structure of political opportunities opens — through elite divisions, new allies, rising costs of repression, or state weakness — making previously futile action feasible.
Political opportunity structure — the configuration of the political environment that shapes whether collective action can succeed; its opening is the timing signal the grievance theories could not supply.
Try it yourself:
One — Separate the fuel from the spark. Pick any movement you have heard of. Ask first: how old was the grievance? (Usually far older than the movement.) Then ask: what changed in the year it rose? Try to name one thing about capacity (a new network, funds, organisers, media) and one thing about opportunity (a division among the powerful, a new ally, a weakened state). If you can find both, you have explained the timing the grievance never could.
Two — Catch the delegitimising move. Next time a protest is in the news, watch how those it challenges describe it. Do they engage its claim , or do they reach for the "mob" — irrational, stirred up, outsiders, disorder? Notice that treating the movement as mere emotion is itself a tactic — a way of answering a grievance without answering it. Then ask the real question: why now, and what changed?
Three — Find the builders. For a movement you admire, look past the famous day and the famous face. Who built the networks, raised the money, trained the organisers in the quiet years before? These people are usually invisible in the story, because the story prefers a spark to a decade of preparation. Finding them is a corrective to both the "mob" theory (they were highly organised) and the romance (it was work, not a spasm of awakening).
What's next: 11.2.2, Why People Join — Collective Action and the Free-Rider Problem — a movement can exist and still fail to move you, because for any single person the coldly rational choice is to stay home and let others bear the risk while you enjoy the win. Why anyone acts anyway is one of the deepest puzzles in social science, and its answer reshapes how we understand cooperation itself.