Which theory places emphasis on the role of "unfulfilled rising expectations"?

Question

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The theory of relative deprivation places emphasis on the role of "unfulfilled rising expectations" which can ultimately lead to social unrest and movements for change. This theory suggests that people become discontented when they perceive that they are not getting what they believe they deserve or what others in their reference group are getting.

Which Theory Places Emphasis on the Role of "Unfulfilled Rising