The study of the human population indicates to many items to measure.
1.The success of the species as a breeding and thriving population.
2. Demographic and population spread based on necessary resources like food and water.
3. Items in nature and mankind that help perpetuate the species or accelerate its demise.
4. Trend analysis for retail profit, resource supply reallocation such as medicines and deficiencies of said items
5. This study allows us to delay or prevent the extinction of our species and indicate economic strengths and weaknesses by region and by country and also by ethnicity.
The key component is these studies indicate population health and longevity of the species, with the intent of improving and prolonging said basic component.