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The significance of mortality modeling extends across multiple research areas, including life insurance valuation, longevity risk management, life-cycle hypothesis, and retirement income planning. A new vitality-based mortality modeling approach is introduced, addressing limitations in existing methods. This four-component framework analyzes individual vitality dynamics, defining mortality as vitality depletion. The model demonstrates versatility in estimation and analysis, with implications for actuarial problems and various research areas, offering an improved paradigm for mortality modeling.