Which theory explaining the origins of social movements suggests that revolutions are most probable when a long phase of social and economic progress is abruptly followed by a significant decline?

Explanation

The deprivation theory posits that revolutions tend to occur when a sustained period of social and economic improvement is suddenly reversed, creating feelings of relative deprivation that motivate collective action. This contrasts with the resource mobilization approach, which emphasizes the role of resources in social movements, and the capitalist collapse theory, which focuses on systemic economic failures.