The life expectancy of ancient people was much lower than that of modern people, mainly due to the following reasons:
Firstly, the medical technology in the ancient times was much worse than that of today. In the past many diseases were almost incurable, however with the development of modern medicine, they became curable. In particular, the emergence of various antibiotics helped people to fight germs and were able to cure various diseases caused by germs, resulting in a great increase in people's life expectancy. For example, tuberculosis caused by Mycobacterium tuberculosis was extremely difficult to cure in ancient times, but in modern times it is possible to cure this disease.
Secondly, in ancient times, the poor people, who made up the majority of the population, had poor immunity due to malnutrition, which induced various diseases. The food of the ancients was not polluted, but due to the low productivity in the past, the people did not produce enough food to eat, and sometimes they had to eat chaff, which led to the people's nutritional deficiencies and thinness, and the resistance to diseases was poor, which made it easy to be infected with various diseases and difficult to be cured, thus shortening the life span.
Third, the ancient people's excessive labor can also lead to premature death. In ancient times, people had to be busy with all kinds of agricultural work every day when they were busy with the silkworms and the fields, and they also had to bear all kinds of labor assigned by the government when they were busy with their farming. Coupled with poor food or even not enough to eat, but also had to work hard, and some even thirty or forty years old, the body collapsed, it is very difficult to get to longevity.
In short, in ancient times, people had poor living conditions, poor medical conditions, and had to engage in heavy labor, so they would age prematurely, and their life expectancy was far less than that of modern times.
The main reason is still backward science and technology, medical backwardness, a tuberculosis bacteria took the lives of many people, "Dream of Red Mansions" book sister Lin, Harumi, etc., which is not dead of tuberculosis it, then the people did not have this preventive knowledge, do not know isolation disinfection, just a strong tonic, the big family is to drink bird's nest soup, ginseng soup, the result can be imagined.
There are reports that the invention of penicillin has extended human life by twenty years, and that there is also the Aix light, CT, nuclear magnetic, scalpel?
Motherland's medicine is profound and profound, but for the weight of the conditioning, the germs ah, the virus wow or intolerable, especially diagnostic means, that is more modern technology to the product of the development of the body infected with this bacterium and that bacterium, traditional Chinese medicine pulse how to come out of it? Even if you put out, Chinese medicine soup can not kill those bacteria that bacteria which, but the Western medicine a test will be clear, a variety of antibiotics can always find effective. Just imagine, if Lin's illness were to be put into the present, any small clinic would be able to take care of it.
From thousands of years of history, China can not close the country, their own closed doors to drink bird's nest soup or this soup that soup is not a cure for anything, thanks to the progress of science and technology, and generally improve the life expectancy of human beings, science and technology is the real first productive forces.