Towards the middle of this 250,000-year period, archaic humans such as Neanderthals and Denisovans began to spread out of Africa, joined later by Homo sapiens.
[85] During the Neolithic period, lasting 8400 years, stone began to be used for construction, and remained a predominant hard material for toolmaking.
Copper and arsenic bronze were developed towards the end of this period, and of course the use of many softer materials such as wood, bone, and fibers continued.
The beginning of bronze-smelting coincides with the emergence of the first cities and of writing in the Ancient Near East and the Indus Valley.
The Late Bronze Age collapse occurs around 1200 BC,[207] extinguishing most Bronze-Age Near Eastern cultures, and significantly weakening the rest.