Jane McAlevey distinguishes three different theories of social change and explains that, of those three, only organizing leads to durable wins.

Demonstrators participating in the Poor People’s March in Washington, D.C., 1968. Source: Library of Congress.
Advocacy doesn’t involve ordinary people in any real way; lawyers, pollsters, researchers, and communications firms are engaged to wage the battle. Though effective for forcing car companies to install seat belts or banishing toys with components that infants might choke on, the strategy severely limits serious challenges to elite power. Advocacy fails to use the only concrete advantage ordinary people have over elites: large numbers. In workplace strikes, at the ballot box, or in non-violent civil disobedience, strategically deployed masses have long been the unique weapon of ordinary people. The 1% have a vast armory of material resources and political special forces, but the 99% have an army.
Over the past forty years, a newer mechanism for change seekers has proliferated: the mobilizing approach. Mobilizing is a substantial improvement over advocacy, because it brings large numbers of people to the fight. However, too often they are the same people: dedicated activists who show up over and over at every meeting and rally for all good causes, but without the full mass of their coworkers or community behind them. This is because a professional staff directs, manipulates, and controls the mobilization; the staffers see themselves, not ordinary people, as the key agents of change….
The third approach, organizing, places the agency for success with a continually expanding base of ordinary people, a mass of people never previously involved, who don’t consider themselves activists at all—that’s the point of organizing. In the organizing approach, specific injustice and outrage are the immediate motivation, but the primary goal is to transfer power from the elite to the majority, from the 1% to the 99%. Individual campaigns matter in themselves, but they are primarily a mechanism for bringing new people into the change process and keeping them involved. The organizing approach relies on mass negotiations to win, rather than the closed door deal making typical of both advocacy and mobilizing. Ordinary people help make the power analysis, design the strategy, and achieve the outcome. They are essential and they know it.
In unions and [social movement organizations] in the United States today, advocacy and, especially, mobilizing prevail. This is the main reason why modern movements have not replicated the kinds of gains achieved by the earlier labor and civil rights movements….
Excerpt from: Jane McAlevey, No Shortcuts: Organizing for Power in the New Gilded Age, pp. 9–12. © 2016 Oxford University Press. Reprinted with permission.