Modern scholars, beginning with V. Danilenko and M. Shmaglij, began in 1975 to write about the Eneolithic as a time of "violation of equilibrium between society and the ambient environment."

Ecological deterioration is beginning to accrue after millennia of farming and deforestation took their toll, making what had once been a land that was bursting with abundance and fertile soil into a relative desert of overworked soil, similar to the Dust Bowl of the American Great Plains during the 1930s.

Cultures that rely on nomadic herding, where the livestock may be moved around to greener pastures freely, survive much better in arid regions than cultures that have permanent settlements that are based on subsistence farming techniques.

The sudden disappearance of the gigantic Cucuteni-Trypillian settlements around 2750 BCE is seen as a switch from extensive agricultural and mixed economy to one placing more emphasis on herding the livestock, particularly cattle.

Although this coincided neatly with Gimbutas' theory of a complete cultural conquest by the Kurgan culture, which was pastoral, over the Cucuteni-Trypillian, which was agricultural, there may be another explanation for it based on what happened to the climate and environment towards the end of the Cucuteni-Trypillian culture's existence.

With verified evidence that Kurgan pastoralists were living cheek-to-jowl with the Cucuteni-Trypillian settlements throughout their entire region for many centuries before the end of the Cucuteni-Trypillian culture, it is becoming very difficult to support Gimbutas' claim of a military conquest of a peaceful civilization.

Rather, it is much more believable and logical to conclude that the members of the Cucuteni-Trypillian society that were facing starvation by farming their dry and barren plots of depleted soil chose instead to take up the practice of their neighbors, and became pastoralists instead.

The Cucuteni-Trypillian culture had managed to thrive for thousands of years without any concept of warfare, and produced one of the most sophisticated civilizations of its time.

As the Indo-Europeans continue to move through the former lands of the Cucuteni-Trypillian culture and on to spread across the entire landscape of Europe and beyond, they carry with them the genetic lineage of the Cucuteni-Trypillian people, which today makes up a significant contribution to the European DNA code.

The Middle East (2781–2638 BCE): Dynastic Emergence, Trade Expansion, and Technological Innovation

Rise of Early Dynastic Period in Sumer

Between 2781 and 2638 BCE, the Early Dynastic Period commenced in Sumer, marking a significant evolution in political complexity and urban organization. Cities such as Ur, Lagash, and Kish became increasingly powerful, governed by hereditary rulers who formalized dynastic lines. This era was characterized by intensified city-state rivalry, prompting both diplomatic interactions and occasional conflicts.

Expansion of Trade and Economic Networks

Trade networks expanded substantially, extending into regions such as the Iranian plateau, Anatolia, the Levant, and Egypt. The thriving exchange included crucial commodities such as metals, textiles, grain, and luxury goods. The city-states, particularly Ur and Uruk, leveraged their geographic advantages and economic resources to dominate regional trade, solidifying their wealth and influence.

Technological and Metallurgical Advances

Technological advancements during this period were significant, especially in metallurgy. The use and production of bronze, an alloy of copper and tin, became widespread, enhancing the effectiveness of tools and weapons. Sites such as Susa and Tepe Yahya in southwestern Iran notably became centers of metallurgical excellence, contributing to the region's technological development.

Cultural Flourishing and Artistic Achievements

Artistic expression flourished, notably through finely crafted cylinder seals, pottery, and statuary. Cylinder seals, intricately carved with scenes of mythology and daily life, served both administrative and symbolic purposes. Pottery from regions like Tepe Sialk and Loristan continued to exhibit sophisticated craftsmanship and distinctive designs, reflecting vibrant regional cultures.

Development of Religious Architecture

Urban religious architecture continued to evolve, with the construction and expansion of monumental temples and ziggurats. These structures, often dedicated to major deities such as Anu, Enlil, and Inanna, reinforced religious authority and served as administrative hubs, unifying the population through collective religious practices.

Governance and Sociopolitical Complexity

Governance structures became more sophisticated, featuring clearly defined hierarchies and bureaucratic systems. Priest-kings (ensi) and their councils of elders presided over increasingly complex administrative systems, managing land distribution, taxation, and the coordination of large-scale public works and religious ceremonies.

Regional Interaction and Influence

Cities along the Mediterranean coast, particularly those in Phoenicia and Greater Syria, continued their prosperous trade relations with Egypt and Anatolia, exchanging resources such as timber, wine, and olive oil. These interactions facilitated not only economic prosperity but also cultural diffusion and technological innovation.

This era signifies a critical juncture in ancient Middle Eastern history, characterized by the emergence of formal dynasties, expanded trade networks, technological innovation, and enhanced sociopolitical complexity, laying crucial foundations for subsequent civilizations.

Bahrain, the major island of a low-lying archipelago located in the Persian Gulf between the Saudi Arabian mainland and the Qatar peninsula, is the probable site of the thriving commercial center of Dilmun in the third millennium BCE.

Sumerian economic records of the third millennium BCE first mention Dilmun in connection with Magan and Meluhha, two other independent culture areas involved in Arabian Gulf trade.

Sumerian mythological texts also refer to a legendary holy land of the same name.

Dilmun, which serves as an entrepôt for the transshipment of raw materials from Magan, Meluhha, and other areas to the east, supplies the Sumerians with copper ore and copper objects, precious stones, stone beads, wood, dates, onions, and pearls in exchange for agricultural and dairy products.

A monumental temple of Baalat-Gebel, the Byblite form of the goddess Astarte, is built around 2700 BCE; dedications from Egyptians had begun with Egypt’s Second dynasty.

Beginning with Khasekhemwy, most first dynasty rulers send a signed gift to the shrine of the "Mistress of Byblos.”

The Sumerians develop cuneiform writing, becoming the world’s first known people to do so; the Elamites quickly adapt the system to their language, as do the newly arrived Akkadian-speaking Semitic tribes.

Mesopotamians make extensive use of finely crafted cylinder seals in the business of temple administration.

Taxation develops in Sumer with priests as tax collectors.

Writing is simplified, and literature, in the form of ritual poetry, begins to emerge.

Decorative arts flourish, expressing fine quality.

Sculpture of the period consists of terra cotta statuettes of both men and women.

Sumerian potters of Susa in Elam decorate their wares by combining crisp geometric devices with stylized representations of birds, mammals, and humans.

Eshnunna (modern Tell Ashmar, Iraq), occupied from the Jemdet Nasr period about 3000 BCE, is the transliteration of the ancient name of a Sumerian city and city-state in lower Mesopotamia.

Although situated in the Diyala Valley northeast of Sumer proper, the city nonetheless belongs securely within the Sumerian cultural milieu, being a major city of Sumer during the Early Dynastic period.

A votive statue, excavated from the Square Temple in 1932–1933, was made between about 2900 BCE and 2600 BCE; it is now in the Oriental Institute of the University of Chicago.

The end of the Early Dynastic I Period, and the beginning of the Early Dynastic II Period in Mesopotamia, is though to have occurred around 2750 BCE.

No inscriptions have yet been found verifying any names of kings that can be associated with the Early Dynastic I period.

The ED I period is distinguished from the ED II period by the narrow cylinder seals of the ED I period and the broader wider ED II seals engraved with banquet scenes or animal-contest scenes.

The Early Dynastic II period is when Gilgamesh, the famous king of Uruk, is believed to have reigned.

Texts from the ED II period are not yet understood.

Later inscriptions have been found bearing some Early Dynastic II names from the King List.