Some people have made a simple comparison between the survival and health of primitive social people and modern society:
In the era of primitive society, human beings lived a life of gathering and hunting, eating things can not be picked, what to pick up and eat, people lack of food and clothing, eat the last meal without eating, have to fly around like birds, running around, life is extremely difficult, various natural disasters, floods and beasts threaten human life safety, but because nutrition is very balanced, the human body at that time was very healthy, although never brushed teeth, but almost no tooth decay (can be confirmed from archaeology), people are rarely sick, mainly died of various natural disasters and man-made disasters, Therefore, at that time, people's life expectancy was much shorter than now, only forty or fifty years old, and people were rare to seventy years old.
How about entering modern society? Agriculture is highly developed, food is extremely rich, some people stay at home for a long time, in the face of abundant food, they do not know what to eat, not even a little appetite, resulting in severe malnutrition; more people can not control their appetite, gluttony, eat more, resulting in obesity, various cardiovascular diseases follow, the same malnutrition. If you do a survey, most people now have tooth decay, even if brushing their teeth every day does not help. Now the environmental pollution is serious, food pesticide residues, affecting people's physical health, a variety of diseases and strange diseases plague people's lives, but modern medicine is highly developed, broken bones can be connected, body parts are broken, can be replaced with fake, no teeth can still eat, so the life expectancy of modern people continues to extend, over 90 years old is also normal.
What do you learn from this contrast? My inspiration is that if there is a strong physique of ancient people and a comfortable life of modern people, it is a great happiness! And where does the healthy body come from? The key is to achieve nutritional balance, strengthen exercise, and at the same time have a good ecological environment.
