Around 10,000 BC, the earth entered the end of the last ice age. Life is better with cats and books shirt The ice melted, the land began to grow. People began to end hunting and gathering with nomadic life, which was the only way to survive during the glacial period and shift to a period of cultivation and cultivation.
Around 8500 BC BC appeared tribes abandoning nomadic and nomadic lifestyle; form the first primitive civilizations along large and equatorial river basins. The most famous are the civilizations in the Nile basin in Egypt; Mesopotamia in Saudi Arabia, Ganges in India and the Yellow River / Changjiang in China