C'mon, science has improved (vastly, if i may add) our lives in general. Disasters by science (and people) are minor. And it has more to do with people than science. And do you really think heart disease is caused by science? How so? Food? Even in developing countries and even in Africa....heart disease is one of the leading cause of death (top 5 to top 1, depends)
Just so you know....Death by heart disease is just inflated (in developed countries) because the people there are getting healthier/older because heart disease is in general a disease that afflicts the old or caused by old age. Food has little to do with that (unless you really really get obese [500 pound], which is rare). Genetics/old age is the main cause, not food or science. As opposed in Africa, they tend to die from HIV (rather from heart) because HIV affects you at any age so you die from HIV before you die from heart. So you drew the wrong conclusions from your data.
Here are the data relevant to my point: From wikipedia:
Humans by Era| Average Lifespan at Birth
Upper Paleolithic 33
Neolithic 20
Bronze Age and Iron Age 35+
Classical Greece 28
Classical Rome 28
Pre-Columbian North America 25-30
Medieval Islamic Caliphate 35+
Medieval Britain 30
Early Modern Britain 40+
Early 20th Century 30-45
Current world average 67.2 2010 est.
Did you see the jump from 20th century? It doubled. And it's caused by a huge reduction in infant mortality rate thanks to hospitals and health care/science.
Life expectancy - Wikipedia, the free encyclopedia
Causes of death in developing countries Number of deaths
HIV-AIDS 2,678,000
Lower respiratory infections 2,643,000
Ischaemic heart disease 2,484,000
Diarrhea 1,793,000
Causes of death in developed countries | Number of deaths (year 2001)
Ischaemic heart disease 3,512,000
Cerebrovascular disease 3,346,000
Chronic obstructive pulmonary disease 1,829,000
Lower respiratory infections 1,180,000
Lung cancer 938,000
List of causes of death by rate - Wikipedia, the free encyclopedia