Summary
Highlights
Globalization, defined as the interconnectedness of the world through trade and technology, has significantly accelerated in the 20th and 21st centuries. Various technological advancements have transformed the world by increasing lifespans, making energy more accessible, and further integrating the global economy.
Communication technologies, though not evenly distributed, radically shrunk geographical distance. Radio brought information directly to homes, exemplified by FDR's fireside chats. Television replaced radio by the 1960s, connecting people to global events like the Vietnam War. Cellular technology, evolving from the 1876 telephone, enabled worldwide communication from any location. The internet, initially for military and scientific data, became widely accessible by the 1990s, fostering global communication and commerce through email and the World Wide Web.
Transportation advancements further reduced geographical barriers. Automobiles changed urban landscapes with the creation of suburbs. Air travel became mainstream after World War II, allowing more people to fly for work and pleasure. Most impactful were shipping containers, standardized metal boxes that revolutionized global economics by enabling businesses to relocate manufacturing to developing countries with lower labor costs, efficiently transporting goods worldwide.
Two key energy technologies emerged. Petroleum became widespread, fueling cars and planes, generating electricity, and replacing coal as the primary power source for industrial manufacturing, leading to increased production but also environmental pollution. Nuclear power offered a cleaner alternative but faced public skepticism due to disasters like Chernobyl and Three Mile Island, causing environmental and human damage.
Medical advancements significantly extended human lifespans and altered societal structures. Antibiotics, starting with penicillin in 1928, saved countless lives from bacterial infections. Vaccines, though an old concept, saw widespread application in the 20th century against diseases like measles and polio. Medical birth control, particularly the pill developed in the 1950s, caused a global decline in fertility rates, leading to population slowdowns in developed nations while populations in developing regions like Sub-Saharan Africa continued to grow rapidly.
Agricultural technologies increased the global food supply. Commercial farming, focusing on profit through large-scale production with expensive machinery, became prevalent in wealthier countries. The Green Revolution in the 1950s and 60s introduced genetically modified, high-yielding grain crops to developing countries, boosting food production significantly. However, it also raised environmental concerns due to intensive farming practices like double cropping, which led to soil exhaustion and erosion, and increased chemical use, causing agricultural runoff and freshwater pollution.