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The primary negative factors on life expectancy in developed countries are, in order of most negative influence to least:
- Transportation-related fatalities. I.e. car, bus, train, and airplane deaths and serious injuries.
- Poor diet - diets which significantly increase risk factors for cardiopulmonary diseases, and also increase the risk of Diabetes.
- Air pollution - particularly from coal-burning and wood-burning
- Domestic (i.e. inside the country, not inside the home) violence; i.e. homicide in all forms. This risk correlates strongly with prevalence of guns in a society.
- Spotty use of available medical care, particularly preventative medicine.
- Genetic factors in a population - the particular genetic makeup of a population determines which diseases it is most predisposed to.
In developing countries, the negative factors on life expectancy are:
- No access to clean drinking water
- Poor sanitation and personal hygiene
- Low levels of vaccination
- No access to common "basic" medical care
- Air, water, and environmental pollution
- Fatal accidents (as a result of no access to trauma care)
- Warfare
In all cases, it appears that human genetics enforce a maximum lifespan of 120 years, and that under optimal conditions, the majority of humans will die around 100.
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∙ 12y ago
ELIZABETH BURNS
there are to many reasons
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