Overpopulation: starvation is the last symptom.
The Myth: Starvation will provide a warning of overpopulation. The Truth: In nature, we define overpopulation as when sustaining the population results in damage to the environment.
Plagues are a problem were before the plague population starts to starve.
Starvation will be a consequence only when overpopulation has resulted in environmental collapse that will result in a rapid population collapse. Starvation is useless as an indicator, by the time there is starvation all environmental food reserves have been consumed, and catastrophe is then unavoidable.