How many periods the history of mankind is divided into.

If you look at the situation as a whole, from the most ancient times to the present, you should start with the Copper Age, which began 5-4 thousand years BC. It was followed by the Bronze Age 3500-1200 BC. Then came the Iron Age from the 12th to the 3rd century BC, when people began to make objects from iron. Then a new era began with the birth of Jesus Christ. Then came the period that historians call the Dark Ages from the 1st to the 6th century. And already from the 6th century, the early Middle Ages began, which covered the period from the 6th to the 13th-14th centuries. Then came the Renaissance century of the 14-15th century. Then the New Time, followed by the period of Industrialization and Modernity.