Gordon Childe, a prominent Australian archaeologist, proposed an influential theory of cultural evolution that emphasized the role of technological and economic transformations in shaping human societies. His framework is primarily known for two major 'revolutions':

1. The Neolithic Revolution: Childe identified this as the pivotal shift from a nomadic hunting-gathering lifestyle to settled agriculture and animal domestication. This revolution, occurring independently in various parts of the world, led to profound changes. It enabled food surpluses, population growth, the development of permanent settlements, and the invention of new technologies like pottery and weaving. This transition laid the foundation for more complex social structures and a sedentary way of life.

2. The Urban Revolution: Following the Neolithic Revolution, Childe described the emergence of cities as a second major transformative period. This revolution involved the development of large, dense populations, specialized labor (beyond food production), social stratification, monumental architecture, long-distance trade, and the invention of writing and arithmetic. These elements collectively led to the formation of state-level societies and early civilizations.

Childe's theory was characterized by a materialist approach, arguing that changes in the means of production (e.g., agricultural techniques, metalworking) were the primary drivers of social and cultural change. He highlighted how technological innovations led to economic surpluses, which in turn facilitated social differentiation and the rise of complex political and religious institutions. While some specific details of his model have been refined or challenged by subsequent archaeological discoveries, Childe's concept of revolutionary shifts in human history due to technological and economic advancements remains a cornerstone of archaeological and anthropological thought, providing a powerful framework for understanding the trajectory of human civilization.