The J-Curve model is a concept used to illustrate the relationship between societal expectations and actual socio-economic conditions over time, typically represented graphically as a 'J' shape. It highlights that during periods of rapid social change, people's expectations can rise faster than the reality of their situation, leading to potential discontent and unrest when a gap emerges between what is anticipated and what is actually experienced. Understanding this model is crucial for analyzing how populations react to changes and the potential for conflict or upheaval.