A World Transformed by Technology

The twentieth century experienced a series of technological revolutions that fundamentally reshaped human life and global interactions. Between 1900 and 2000, the world’s population grew dramatically from approximately 1.6 billion to 6 billion people, and technological advances played a critical role in supporting and sustaining this growth. Innovations in communication, transportation, energy, agriculture, and medicine transformed economies, societies, and demographic patterns across the globe.

After 1900, technology accelerated global connectivity and productivity, enabling faster and more efficient exchange of goods, ideas, and people. Transportation—defined as the movement of goods and individuals—evolved alongside communication systems and energy production, creating an interconnected global system. As a result, regions that were once isolated became increasingly linked through trade and communication networks, laying the foundation for modern globalization. By the end of the century, these technological shifts had reshaped how at least half of humanity lived, as access to infrastructure and modern systems expanded worldwide.

These transformations were driven by innovations across multiple domains. Communication technologies reduced the limitations of distance, while transportation advancements made it possible to move people and products at unprecedented speeds. By the mid-twentieth century, air travel allowed individuals to cross continents in hours rather than days, dramatically increasing global interaction. At the same time, new energy sources powered industrial expansion, agricultural innovations fed billions, and medical advances extended human life. As a direct result of these combined developments, global life expectancy increased from 31 years in 1900 to 66 years by 2000.

By the late twentieth century, these developments had interconnected approximately 80 percent of the world’s economies, creating a truly globalized system. Around 3 billion people relied on new technologies in their daily lives, demonstrating the profound reach of these innovations. One early example of this transformation was the first transatlantic telephone call in 1927, which connected New York and London using radio technology. Although the call cost $75 per minute (about $1,200 today), it symbolized a dramatic reduction in geographic barriers. News of the event reached 20 percent of the populations of the United States and the United Kingdom, and by 1970, global communication networks handled over 1 billion calls annually. This example demonstrates how early communication technologies directly contributed to increasing global connectivity.

Shrinking Geographic Distance

New communication and transportation technologies significantly reduced the constraints imposed by geographic distance throughout the twentieth century. These developments are central to understanding globalization, as they allowed people, goods, and ideas to move across the world more quickly and efficiently than ever before.

At the same time, container shipping revolutionized global trade. Standardized shipping containers, introduced in the 1960s, streamlined the movement of goods and reduced costs. By 2000, approximately 90 percent of global trade was transported using containerized shipping. Trade volume increased dramatically, rising from $100 billion in 1960 to $4 trillion by 2000. As a result, these technologies enabled approximately 70 percent of the world’s economies to participate in global trade, directly contributing to economic globalization.

Energy Technologies and Industrial Productivity

Advances in energy technologies, particularly petroleum and nuclear power, played a crucial role in driving economic growth and increasing industrial productivity during the twentieth century. Energy technologies—systems used to generate and distribute power—enabled industries to expand production and operate more efficiently.

These developments increased the availability of energy, which in turn allowed industries to expand production.

These energy innovations led to significant increases in productivity. By 1970, about 80 percent of manufacturing relied on petroleum and nuclear energy. Industrial output expanded rapidly, with global steel production increasing from 50 million tons in 1900 to 800 million tons by 2000. As goods became more abundant, living standards improved, and by 1980, 70 percent of households had access to appliances powered by electricity. This demonstrates how increased energy availability directly contributed to rising standards of living.

Economic growth also accelerated during this period. Global GDP increased from approximately $1 trillion in 1900 to $40 trillion by 2000, affecting around 5 billion people. Petroleum fueled 50 percent of transportation by 1960, while nuclear energy powered large portions of industrial economies, supporting billions of people through expanded production and infrastructure.

The Obninsk Nuclear Power Plant in the Soviet Union provides a clear example of this transformation. Opened in 1954, it was the first nuclear power plant connected to a power grid, producing 5 megawatts of electricity and powering 2,000 homes. By 1960, it increased industrial energy output by 10 percent in the region and supported 50 percent of local factories. Its success led to the development of 100 nuclear reactors by 1970, generating power for 100 million people. This example demonstrates how new energy technologies directly contributed to industrial expansion and economic growth.

By the 1970s, approximately 50 million women across 100 countries were using the contraceptive pill, gaining greater control over family size and reproductive choices. Fertility rates declined significantly in developed regions, dropping from about four children per woman in 1950 to two by 1990. These changes affected roughly 1 billion people and contributed to shifting gender roles, as more women entered the workforce. By 1980, women made up approximately 40 percent of workers in many developed economies. This demonstrates how demographic changes were closely linked to social and economic transformations.

The global impact of birth control expanded further by the end of the century. In developed nations, 70 percent of women used contraception by 1990, while usage in developing regions rose to 50 percent by 2000. Population growth rates slowed, dropping from about 2 percent per year to 1 percent annually for populations totaling around 4 billion people. Families began to have fewer children—typically two instead of six—allowing for greater investment in education and economic development. This shows how declining fertility rates contributed to improved economic outcomes.

South Korea’s family planning programs of the 1960s and 1970s illustrate the impact of birth control on economic and demographic transformation. Beginning in 1961, the government distributed contraceptives such as pills and intrauterine devices (IUDs), reaching 2 million women by 1975. Fertility rates dropped from six children per woman to two, while economic growth accelerated, with GDP increasing by 5 percent annually. These policies reduced population pressure, prevented famine, and contributed to rapid industrialization. This example demonstrates how demographic policies can directly influence economic development.

By the 1960s and 1970s, these innovations had doubled wheat yields to approximately three tons per hectare and increased global food production by 50 percent, reaching 500 million tons by 1980. These methods spread to 70 percent of developing countries by 1990, covering approximately 1 billion hectares of farmland. As a result, the Green Revolution helped feed an additional 2 billion people as the global population approached 6 billion by 2000. This demonstrates how technological innovation directly supported population growth.

Fertilizer use expanded rapidly, reaching 100 million tons per year by 1975, and high-yield seeds were used on 50 percent of farmland in countries such as Mexico and India. These developments reduced hunger, with malnutrition declining by 20 percent by 1990. Agricultural productivity increased economic output, generating approximately $200 billion annually and supporting billions of farmers and consumers.

India provides a key example of the Green Revolution’s impact. Between 1965 and 1970, wheat production doubled from 10 million to 20 million tons using seeds developed by Norman Borlaug. This increase helped feed 500 million people during a severe drought and prevented famine for approximately 100 million individuals. The program also strengthened India’s economy, reducing reliance on imports and contributing to sustained economic growth. This example illustrates how agricultural innovation can prevent crisis and support development.

By 1950, approximately 50 million vaccine doses were administered annually, and antibiotics such as penicillin had saved millions of lives. After World War II, global health campaigns expanded access to these treatments, reaching approximately 3 billion people by 1970. As a result, life expectancy increased from 31 years in 1900 to 66 years by 2000, with developing regions experiencing some of the most dramatic improvements. This demonstrates how medical advances directly contributed to population growth.

Vaccination campaigns significantly reduced disease rates, with polio cases dropping from 350,000 in 1988 to just 1,000 by 2000. Antibiotics reduced mortality rates in hospitals by 50 percent by 1960, and by 1980, 70 percent of children worldwide had been vaccinated against major diseases. These improvements contributed to population growth and increased the size of the global workforce, supporting economic expansion.