Why were there no mobile phones in ancient times? Is it because ancient people were more stupid than modern people and did not even think of using mobile phones?

The most basic foundation of modern industrial civilization is electricity. Electricity was widely used after the invention of the electric motor in the 19th century. The main accessory circuit board used in mobile phones was invented and applied after World War II. Other accessories such as camera heads, batteries, monitors, etc. all require modern high-precision machines to produce. The production of mobile phones requires a complete industrial chain and a large number of educated industrial workers, which did not exist in ancient times.

In the ancient world, countries were basically based on agriculture, nomadism, and marine civilization, and mobile phones were the product of industrial civilization. It was not until the late 18th century that the first industrial revolution began. It wasn't until 1973 that American Motorola engineer Martin Cooper invented the world's first commercial mobile phone.

It is not that ancient people are duller than modern people, but that technology needs to be developed step by step. Modern people have developed modern technology based on the development of ancient people.

It is a joke to use ancient times when there were no mobile phones to measure the intelligence and stupidity of people under certain conditions.

The development stage of human civilization is limited by the historical conditions and cognitive level conditions at that time. As a product of the times, it is limited by productivity. Scientific and technological products are based on certain material conditions and are understood by people. Even today's smartphones are not something that can be solved once and for all. How it will develop in the future and to what extent it will develop, based on the current understanding of human civilization, it is impossible to come up with a result that everyone will be convinced of. Can you say that modern people are also stupid?

The intelligence and wisdom of ancient people were very popular at that time. China’s four great inventions and some of their applications in people’s lives are familiar to everyone. At present, humans on earth are only a level 0.75 civilization. In a few years, the development of human civilization will be able to control the universe. This is not alarmist. If you have time, it is better to study the history of human development, so as not to know everything.

Tell me another little joke

Wang Mang, as a time traveler, usurped the throne and became an emperor. He concentrated such resources and manpower. Moreover, he also had the knowledge level of modern people, and even The vernier caliper was made, but not even a walkie-talkie appeared. He probably also came up with a mobile phone, but the technology tree was too long and there was no time to develop.