Copper is mined before 4500 BCE at the eastern European sites of Ai Bunar, near Stara Zagora in Bulgaria, and Rudna Glava in present-day eastern Serbia.

At the latter site, which pottery finds show to belong to the Vinca culture, shafts are cut into the hillside, with scaffolding constructed for easy access to the veins of ore.

The uniformity of design characteristic of Linear Pottery sites begins to break down around as various regional groups emerge, such as the Rössen, Lengyel, Tisza, and Stroke-ornamented Pottery (Stichbandkeramik) cultures.

The Middle East (4653–4510 BCE): Expansion of Canal Irrigation and Cultural Interactions

Development of Canal Networks

Between 4653 and 4510 BCE, the Ubaid 2 period, also known as Hadji Muhammad (4800–4500 BCE)—named after its type-site—marked significant advancements in agricultural infrastructure, particularly the extensive development of canal networks originating from major settlements. These canal systems played a critical role in supporting increasingly stable and productive agriculture, enabling communities to thrive despite the region's challenging environmental conditions.

Innovations at Choga Mami

Irrigation agriculture appears to have first emerged at Choga Mami (4700–4600 BCE), a crucial archaeological site in southern Iraq characterized by Samarra ware pottery. Evidence suggests that this site demonstrated operational canal irrigation systems as early as 6000 BCE. The techniques pioneered at Choga Mami were rapidly disseminated, enhancing agricultural productivity and community resilience throughout the region.

Cultural Exchange and Ambiguities

During the broader period between 6500 and 4500 BCE, the directionality and nature of cultural exchanges remain somewhat ambiguous. While extensive interactions are evident across various sites, establishing clear patterns of cultural influence remains challenging. These interactions likely involved a complex interplay of technological innovations, trade networks, and agricultural practices, significantly shaping regional developments.

Regional Impact and Integration

The expansion of canal-based irrigation profoundly impacted the Middle East, transforming agricultural practices and facilitating demographic growth and settlement expansion. The enhanced agricultural stability fostered increased specialization, trade, and social complexity, setting the stage for the rise of urban centers and structured societal hierarchies in subsequent periods.

This era highlights a critical stage in Middle Eastern history marked by technological advancement in irrigation, significant agricultural improvements, and complex cultural exchanges, laying important foundations for the region's continued societal and economic development.

Ubaid 2, sometimes called Hadji Muhammad (4800–4500 BCE), after the type-site of the same name, has seen the development of extensive canal networks from major settlements.

Irrigation agriculture, which seem to have developed first at Choga Mami (4700–4600 BCE), a Samarra ware archaeological site of Southern Iraq which shows the first canal irrigation in operation at about 6000 BCE, and rapidly spread elsewhere.

It is not clear which way cultural developments were flowing in the 6500 to 4500 BCE period.

The Akahoya eruption, one of the largest eruptions during the Holocene, ocurring around 4350 BCE, ejects about one hundred and fifty cubic kilometers (thirty-six cubic miles) of tephra, giving it a 7 on the Volcanic Explosivity Index.

One of only six known eruptions reaching that magnitude during the Holocene, or the last twelve thousand years, it forms the massive, mostly submerged Kikai Caldera, up to nineteen kilometers (twelve miles) in diameter in the Osumi Islands of Kagoshima prefecture, Japan.

Pyroclastic flows from that eruption reach the coast of southern Kyushu up to one hundred kilometers (sixty-two miles) away, and ash falls as far as Hokkaido.

It dramatically changes vegetation in Southern Kyūshū.

Archaeologically it has been dated around 7,300 cal. BP during the Earliest Jōmon period, but it has also been radiocarbon dated to 6,500 BP.

The very earliest plow was the simple scratch-plow, or ard, which consists of a frame holding a vertical wooden stick that was dragged through the topsoil (still used in many parts of the world).

It breaks up a strip of land directly along the plowed path, which can then be planted.

Because this form of plow leaves a strip of undisturbed earth between the rows, fields are often cross-plowed at ninety degree angles, and this tends to lead to squarish fields.

In the archaeology of northern Europe, such squarish fields are referred to as "Celtic fields.’

Farmers in the lower Danube region begin using cattle as plow animals by about 4500, at which time central and eastern European cultures begin to practice rich burial patterns.

The Middle East (4509–4366 BCE): Chalcolithic Expansion and Animal Domestication

Occupation of Tepe Yahya

Between 4509 and 4366 BCE, the archaeological site of Tepe Yahya, located approximately 225 kilometers (140 miles) south of Kerman in present-day Iran, began its initial occupation around 4500 BCE. This site became an important center of early human settlement and technological advancement in the region.

Chalcolithic Technological Spread

By 4500 BCE, the Chalcolithic era—characterized by the concurrent use of copper and stone tools—had spread widely throughout the Fertile Crescent. This marked significant technological advancement, fostering improved tools and greater efficiency in daily activities, agriculture, and trade.

Domestication and Agricultural Development

The domestication of oxen, which possibly began as early as the sixth millennium BCE in Mesopotamia, profoundly impacted agricultural practices by providing farmers with the necessary power for developing plowing techniques. The introduction of the plow significantly enhanced agricultural productivity and facilitated expansion into previously difficult-to-cultivate areas.

Regional Animal Domestication

Animal domestication continued extensively across the region, reaching as far north as present-day Turkey and as far south as the Zagros Mountains. These practices supported increasingly stable and productive agricultural systems, contributing to the prosperity and expansion of communities across a broad geographic area.

This period highlights significant advancements in technology, agriculture, and domestication, underpinning further social and economic developments across the ancient Middle East.

Tepe Yahya, an archaeological site in present Iran, one hundred and forty miles (two hundred and twenty-five kilometers) south of Kerman is occupied from 4500.

The Chalcolithic, or copper- and stone-working technology, encompasses the Fertile Crescent by 4500 BCE.

There are also tribes that practice domesticating animals as far north as Turkey, and as far south as the Zagros Mountains.