Lewin’s Change Model
Change is easier to sustain when the forces maintaining the current equilibrium are loosened before movement and the forces supporting the new state are strengthened afterward, since skipping either tends to let the old equilibrium reassert itself.
What Is It?
Kurt Lewin, a social psychologist working on group dynamics in the 1940s, described organizations and social groups as existing in a “quasi-stationary equilibrium,” a balance held in place not by the absence of pressure to change but by opposing driving and restraining forces roughly canceling out, the broader theory now known as force-field analysis. The framework directs attention away from the desired future state alone and toward the forces maintaining both the current state and the one an organization is trying to reach, change often stalls not because the direction was wrong but because nothing was done to loosen the forces holding the current state in place, or because nothing was done afterward to stabilize the new state, letting the old equilibrium quietly reassert itself once attention moved elsewhere. Lewin himself wrote in terms of unfreezing, moving, and freezing, not the “unfreeze, change, refreeze” three-word slogan taught in most textbooks today, and he didn’t present quasi-stationary equilibrium, force-field analysis, and this three-part sequence as one tidy, formally unified model. Historians of management thought (Cummings, Bridgman, and Brown, 2016) have shown that later interpreters assembled Lewin’s separate ideas into the clean three-step package now attributed to him, “refreezing” in particular is a term Lewin himself didn’t use, and Lewin died in 1947, before that specific three-step formulation was fully codified into the form now common in textbooks. What’s durable regardless of exact attribution is the underlying insight: change that skips deliberately destabilizing the current arrangement, or skips deliberately re-stabilizing the new one, tends not to last.
Why Does It Matter?
Organizations routinely treat change as though the hard part is the change itself, announcing a new process, structure, or tool and then measuring success by whether the announcement happened. Lewin’s framework suggests the harder, more neglected work sits on either side of that announcement: loosening whatever driving and restraining forces are holding the current way of doing things in place before asking people to adopt something new, and then doing deliberate work afterward to keep the new way from eroding back toward the old one once the initial push fades.
In practitioner experience, the stabilizing stage is the one most often skipped. A new practice gets rolled out, attention moves to the next initiative, and within a few months the organization has quietly reverted to something close to its original equilibrium, not because anyone decided to revert, but because nothing was done to hold the new state in place once the pressure that created it relaxed.
What Changes Once You See It?
You start asking, before pushing a change forward, what forces are currently holding the existing state in equilibrium, and whether those forces have actually been addressed or just temporarily overridden by enthusiasm or mandate.
You start treating the period immediately after a change lands as still part of the change effort, not as the finish line, building in deliberate reinforcement, new defaults, updated incentives, visible reminders, rather than assuming the new state will hold on its own.
You also get more skeptical of change efforts that focus entirely on the desired future state without addressing what’s currently keeping the present state stable, since pushing harder in the desired direction without loosening the restraining forces often just increases tension without producing durable movement.
Common Misunderstandings
- It isn’t a literal three-step checklist that Lewin himself laid out in that exact form. The three-word version is a widely used simplification of a broader theory about forces in equilibrium, useful as a memory aid, less useful if taken as a rigid, universally applicable procedure.
- It’s best understood as foundational social-psychological theory that later interpreters simplified into a practitioner change model, not as an empirically validated three-step procedure for organizational change.
- It doesn’t mean change should always be slow or heavily prepared. Some situations call for fast, decisive action, the model’s point is about what’s required for a change to last, not a claim that every change needs an extended unfreezing phase.
- It isn’t the same as simply building support or buy-in for a change. Unfreezing is specifically about loosening the forces maintaining the current equilibrium, which can include structural and incentive changes, not only persuasion or communication.
- It doesn’t guarantee a change will stick just because all three stages were nominally followed. Stabilization can fail if the reinforcing structures put in place aren’t strong enough to counter forces still pulling back toward the old equilibrium.
Diagnostic Question
What’s currently holding the present state in place, and have we actually loosened those forces, or just added pressure in the direction we want to go?
Explore Further
Field Notes
- None yet.
Related Field Guide
Origin
Kurt Lewin developed force-field analysis and the concept of quasi-stationary social equilibria in his group dynamics research through the 1940s, most notably in “Frontiers in Group Dynamics” (1947), Human Relations. The now-standard “unfreeze, change, refreeze” three-step formulation was substantially the work of later interpreters systematizing and popularizing Lewin’s ideas after his death in 1947; historians Stephen Cummings, Todd Bridgman, and Kenneth G. Brown revisited this attribution history in “Unfreezing Change as Three Steps” (2016), Human Relations.