The first archaeological stage of early human history, that is, from the appearance of human beings to the appearance of bronzes, began about two or three million years ago and ended about 6000 to 4000 years ago. This era is a period when human beings gradually evolved from ape-man to modern man after a long history. It can be divided into Paleolithic Age, Mesolithic Age and Neolithic Age.

Two: Bronze Age:

The first era of human utilization of metals. The development stage of human material culture marked by the use of bronzes. China is the earliest known copper smelting technology civilization in the world. At present, the earliest copper smelting in the world was found in Jiangzhai Site, Shaanxi Province, China.

Three: The Iron Age:

The earliest known iron is the iron in meteorites, which the ancient Egyptians called sacred. A long time ago, people used this natural iron to make blades and ornaments, which is the earliest case of human using iron. About 3400 years ago, Hittite Kingdom was the first country to smelt iron in the world. From the iron-edged bronze cymbals unearthed in Gaocheng, Hebei Province and Liu Jiahe, Pinggu, Beijing in the 1970s, we can know that China began to use iron in the middle of Shang Dynasty, but this is a rare thing. In the late Western Zhou Dynasty, China began to use iron and entered the era of combining iron, copper and stone. The iron sword with copper handle unearthed from the tomb of Guo State in Sanmenxia, Henan Province, can prove that there was artificial iron smelting in China in the late Western Zhou Dynasty.

Fourth: age of steam.

The industrial revolution first began in Britain in the 1960s in 18, and a great deal of foreign expansion took place in the early 9th century. Therefore, age of steam began in the early19th century and ended in the first industrial revolution in 1970s. During this period, the capitalist machine revolution began to appear and the capitalist world system began to be initially established. The invention and application of the steam engine brought mankind into age of steam.

Five: the electrical age:

1In the 1960s, mankind began its first industrial revolution. 100 years later, the development of human social productive forces once again ushered in a major leap. People call this change "the second industrial revolution". The electric light and telephone used today were invented in this revolution, and mankind entered the "electrical age" from this.

Six: the atomic age:

One gram of uranium produced by fission is equivalent to the energy released by burning 3 tons of coal or 200 liters of oil, and its explosive power is equivalent to 20 tons of TNT explosive. In the process of transforming this experiment into the first atomic bomb, Italian physicist Fermi won the Nobel Prize. Since then, atomic energy has been widely used and mankind has entered a new era.

Seven: the information age:

The concept of time span in developed countries in Europe and America is from 1969 to the future. In China and some developing countries, the information age means 1984 to the future, which is 15 years later than Europe and America.

What era will we enter in the future? I believe this answer will come soon.