In the most extreme cases, the strain Smelser was talking about could take the form of oppression, which, in turn, could spark revolutionary movements and uprisings.

FORBES: Restlessness Fuels Marketing Movements

The derivation of this idea starts with the noted sociologist and social movement expert Neil Smelser, who theorized that social movements (and Smelser was really talking about Movements with a capital M, the kind that involve freedom, justice, fairness and the like) come about because of a combination of factors starting with social strain.

FORBES: Restlessness Fuels Marketing Movements