Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze ages, and one of the first civilizations in the world along with Ancient Egypt and the Indus Valley. Living along the valleys of the Tigris and Euphrates, Sumerian farmers were able to grow an abundance of grain and other crops, the surplus of which enabled them to settle in one place. Prehistoric proto-writing dates back before 3000 BC. The earliest texts, from c. 3300 BC, come from the cities of Uruk and Jemdet Nasr; early cuneiform script emerged around 3000 BC.
Nuragic civilization
In the Stone Age the island was first inhabited by people who had arrived there in the Paleolithic and Neolithic ages from Europe and the Mediterranean area. The most ancient settlements have been discovered both in central and northern Sardinia (Anglona). Several later cultures developed on the island, such as the Ozieri culture (3200−2700 BC). The economy was based on agriculture, animal husbandry, fishing, and trading with the mainland. With the diffusion of metallurgy, silver and copper objects and weapons also appeared on the island.