Around 6000 BC, man achieved an important achievement:he discovered that it was possible to make objects out of metal. The first metal he worked on was copper. Later, through fusion, he mixed copper with tin and obtained a stronger metal, started to produce more powerful weapons and more efficient tools.
Around 1500 BC, he managed to use iron.
The use of metals, in this period, was the main factor for the improvement of the instruments and techniques used in war, hunting and in agriculture. The oldest metallurgical remains have been found in Iran, Turkey and Lebanon.
With agriculture, animal husbandry, the development of ceramics, weaving and the use of metals, specialist workers, the weaver and the blacksmith emerged.
At the same time, the development of these activities led to the emergence of the first settlements, with the formation of small towns and cities. As a result of these conquests, men began to produce more than they needed for their own consumption.
Thus, disputes began to see who would get that surplus. The victors enriched themselves by appropriating the lands and goods of the vanquished, who became poorer.
Skilled work, cities, private property, social inequality, the state and writing are believed to have first emerged in Mesopotamia and Egypt.