Why do people still have diseases when they have evolved to the present?

As far as I know, the human body contains tens of trillions of cells, and all kinds of cells cooperate with each other in the human body, making the human body a powerful cell system that can be lower than external aggression, but this system is still not perfect. Specified below:

All living things in the biological world can be connected in some way, people are born to eat, they will ingest microorganisms, and after death, they will become nutrients for microorganisms (cremation is counted separately), the human body contains many substances that can be used by microorganisms, and viruses can rely on human cells to multiply themselves. Human evolution can not get rid of this phenomenon, and people do not have enough ability to take the initiative to get rid of it, and the way of life of living beings makes the global biological system and environment form a system of material and energy circulation.

In the process of human evolution, the gene continues to mutate, and has the ability to resist the first hormone, that is, the human body's immunity, but the human body immunity is still defective, and can identify some of the harmful factors that have entered the human body, and will be partially expelled and partially swallowed and digested, but the harmful factors that have not entered the human body are difficult to perceive and actively discharge, and the immune system function is also limited, when the harm of the human body exceeds the ability of the immune system to bear, the human body will enter a disease state. Physical and chemical phenogens may also directly form a strong killing effect on cells, which is also difficult for the immune system to overcome.

Human beings and various pathogenic microorganisms are still in a state of competition with each other, and this survival competition promotes the evolution of both sides, and the human body wants to escape the infection of microorganisms, and microorganisms will desperately infect the human body. Because the human body is not a perfect system, human beings invented medicine, we need to understand some health knowledge by ourselves, enhance the understanding of modern medicine, some diseases are relatively easy in the early stage, miss the best time may put yourself in a dangerous situation, uncomfortable conditions last too long do not endure, go to the hospital is serious.

The main cause of illness in the human body is because of genetic mutations in cells. The earth's environment is changing all the time, and cells will mutate according to changes in the environment, and the functions of the human body will not adapt to the mutated cells, and diseases will appear.

Because there are many bacteria and viruses on the earth, and human beings are not completely immune, there will still be diseases.

Illness has not yet threatened the survival of human beings, and for the level of life, illness is not a threat to human beings, so it has not evolved to this aspect.

Humans are not evolving anymore. These manifestations are that people's physical mobility will gradually increase, people's reflexes will be strengthened, people's brains will also change, people's mobility will gradually improve, and people's quality will become higher and higher.

Yes, humanity is constantly evolving. The brain nerves have been constantly developing, human wisdom is getting smarter and smarter, the power of the brain will continue to decrease, there are many new changes in the body organs, and now human beings are very smart, which are the manifestations of human evolution.

Yes, the children born from generation to generation are very smart, and their eyes are very big, and they will slowly become taller, very cute, and the hair on their bodies is getting less and less.

When it comes to human evolution, there is a misconception that evolution was a long time ago. In fact, as a species, humans are still evolving. Not only that, but it's also faster than before.

We're still drinking milk.

When the mother stops breastfeeding, the genes that regulate the digestion of lactose in humans are turned off. After humans began to domesticate cattle and sheep, drinking the milk of these animals became an important nutritional supplement. It was from this time that this one gene mutated, allowing humans to digest lactose.

People who carry this gene are also more likely to transmit their genes.

A 2016 study found that 3,000 years ago, East Africans' ability to digest lactose was still evolving. Now, more than 95% of Nordic people carry this gene that can digest lactose.

We are losing wisdom teeth.

What kind of food needs to be chewed has led to the evolution of human teeth. Our ancestors had larger jaws than their modern counterparts, which helped them chew grass roots, nuts, and leaves. Wisdom teeth were the "backfilling" teeth of the time, and they were an important tool for human ancestors to chew food.

At that time, due to the frequent eating of foods that were difficult to chew, the teeth were worn out, so wisdom teeth were used as a supplement, and now, we can better cook and crush the food. Food becomes softer and easier to chew. So our jaws are smaller, and the wisdom teeth are here.

Because of the small space in the mouth, wisdom teeth often do not come out. Just like the appendix, wisdom teeth can become vestigial organs. It is estimated that 35% of people are born without wisdom teeth.

Some scientists believe that wisdom teeth eventually disappear over time.

We are still producing genetic variants that fight disease.

In 2017, a team of researchers looking for evidence that humans are still evolving discovered 1,800 genes that were prevalent 40,000 years ago, many of which have been linked to fighting infectious diseases such as malaria. Currently, more than 12 new malaria-resistant genetic variants are circulating among Africans. Another study found that natural selection is beneficial for city dwellers.

Urban living can produce genetic variants that allow us to further resist diseases such as tuberculosis and leprosy. This seems to be typical evidence that humans are still evolving, that is, the development of cities has become a force of choice that has prompted humans to evolve as a species.

Evolution evolves all the time, and the end of science is not theology!

Will humans ever evolve again? Or has humanity reached the end of its evolution? Today, let's take a look at this topic together.

In addition, in order to adapt to changes in the environment and the development of society, human beings are constantly evolving. It's just that because of our short lifespan, we may not be aware that humans are evolving.

Humans are still evolving. The development of the human brain so far is only the tip of the iceberg, and it is believed that as the human brain develops more, human beings will continue to evolve.

Dialectical thinking about peopleHistorical evolutionwithBiological degradation

Man is a social animal. Therefore, social evolution is the direction of human development, and because human beings continue to evolve in history, the greater the difference between animals and animals.

Biological degradationIn the course of human evolution, man not only broke away from the animal kingdom, but also created superior material living conditions. However, in modern life with the goal of pursuing economic benefits, there is a certain degeneration of human beings, which is obviously manifested in genetic quality, symbiotic function and personality.

Look at their teeth gaps.

The latest reports show that the brain size of humans is shrinking as we evolve. "For the past 20,000 years", the researcher said"The male brain capacity shrank from 1,500 cubic centimeters to 1,350 cubic centimeters, which is equivalent to the size of a tennis ball; The same is true for women with reduced brain volume. "Some theories suggest that the deterioration of certain brain functions in modern humans due to less outdoor activity and easier digestion of food, coupled with a decline in infant mortality, has allowed babies with smaller brain sizes to survive, and the average size of the human brain has declined.

Historical evolution

The profound contradiction between social development and resources and environment determines that mankind in the present era and in the future must take the path of sustainable development. The essence of sustainable development is to create a new type of human-land relationship. The fundamental basis for establishing a new relationship between man and earth is cultural evolution.

It should take the essence of excellent traditional culture such as "the unity of nature and man" as the cultural gene, follow the basic principles of human cultural ecology, and gradually form a sustainable cultural climate with the help of cultural dissemination, penetration and leading role of culture, so as to gradually implement the values and development concept of the new type of human-land relationship into human social and economic life.

It depends on whether you want to look at it from a social perspective or an individual perspective, from a social point of view, human beings are evolving and progressing, but from an individual point of view, not all human beings are as fat as you give, if you think that muscular development is a sign of evolution, then fitness people have a lot of muscles, if you think IQ is a sign of evolution, there is no fault line among scientists today, and talents are still emerging in various fields. All in all, your question is a bit vague, I hope my answer can help you.

Human beings must have evolved, and in terms of degeneration, human beings may be behaviorally degenerate. But in terms of intelligence, human beings are constantly evolving. With the advent of artificial intelligence, it is even possible for humans to achieve immortality in the near future, and this must be a representative of evolution.

Trivia: Are Humans Still Evolving?