Saskia Sassen in the context of "New York City"

Globalization is the process of increasing interdependence and integration among the economies, markets, societies, and cultures of different countries worldwide. This is made possible by the reduction of barriers to international trade, the liberalization of capital movements, the development of transportation, and the advancement of information and communication technologies. The term globalization first appeared in the early 20th century (supplanting an earlier French term mondialisation). It developed its current meaning sometime in the second half of the 20th century, and came into popular use in the 1990s to describe the unprecedented international connectivity of the post–Cold War world.The origins of globalization can be traced back to the 18th and 19th centuries, driven by advances in transportation and communication technologies. These developments increased global interactions, fostering the growth of international trade and the exchange of ideas, beliefs, and cultures. While globalization is primarily an economic process of interaction and integration, it is also closely linked to social and cultural dynamics. Additionally, disputes and international diplomacy have played significant roles in the history and evolution of globalization, continuing to shape its modern form. Though many scholars place the origins of globalization in modern times, others trace its history to long before the European Age of Discovery and voyages to the New World, and some even to the third millennium BCE. Large-scale globalization began in the 1820s, and in the late 19th century and early 20th century drove a rapid expansion in the connectivity of the world's economies and cultures. The term global city was subsequently popularized by sociologist Saskia Sassen in her work The Global City: New York, London, Tokyo (1991).

Globalization describes the growing interdependence of the world's economies, cultures, and populations, brought about by cross-border trade in goods and services, technology, and flows of investment, people, and information. Countries have built economic partnerships to facilitate these movements over many centuries.