The trends of mechanization of goods and services and networks of global communication, which were begun in the 19th century, continued at an ever-increasing pace in the 20th. In spite of the terror and chaos, the 20th century saw many attempts at world peace. As the 35th President of the United States John F. Kennedy said:
What kind of peace do we seek? I am talking about a genuine peace, the kind of peace that makes life on earth worth living. Not merely peace in our time, but peace in all time. Our problems are man-made, therefore they can be solved by man. For in the final analysis, our most basic common link is that we all inhabit this small planet, we all breathe the same air, we all cherish our children's future, and we are all mortal.
Virtually every aspect of life in virtually every human society changed in some fundamental way or another during the twentieth century and for the first time, any individual could influence the course of history no matter their background. Arguably, the 20th century re-shaped the face of the planet in more ways than any previous century.
• Death rates
• Infant mortality
• Infectious disease
• Life expectancy
• Maternal death rates
Scientific discoveries such as relativity and quantum physics radically changed the worldview of scientists, causing them to realize that the universe was much more complex than they had previously believed, and dashing the hopes at the end of the preceding century that the last few details of knowledge were about to be filled in.
The 20th century has sometimes been called, both within and outside the United States, the American Century, though this is a controversial term. For a more coherent overview of the historical events of the century, see The 20th century in review.
Timeline of the Twentieth Century
• 1900-1909 - Model-T, First Flight, San Francisco Earthquake, Einstein's Theory of Relativity, Boxer Rebellion, First Silent Movie;
• 1910-1919 - World War I, Triangle Shirtwaist Factory, the Titanic, Russian Revolution, Mata Hari, Prohibiton;
• 1920-1929 - Women's Suffrage, King Tut's Tomb, Mussolini, J. Edgar Hoover, Mein Kampf, Monkey Trial, Charles Lindbergh;
• 1930-1939 - Great Depression, Mohandas Gandhi, Empire State Building, Amelia Earhardt, Nazis, "Monopoly," the Hindenburg;
• 1940-1949 - World War II, Adolf Hitler, Pearl Harbor, Manhattan Project, Chuck Yeager, Berlin Airlift, Apartheid, Communist China;
• 1950-1959 - Hydrogen Bomb, McCarthyism, Korean War, Color TV, Polio Vaccine, Mt. Everest, Disneyland, Rosa Parks, Sputnik;
• 1960-1969 - JFK, Martin Luther King Jr., Eichmann Trial, Berlin Wall, Cuban Missile Crisis, Draft Protests, Charles Manson;
• 1970-1979 - Vietnam War, Munich Olympic Games, Watergate, Abortion, Patty Hearst, Pol Pot, Star Wars, Disco, Margaret Thatcher;
• 1980-1989 - Mikhail Gorbachev, Mount St. Helens, AIDS, Pac-Man, Personal Computers, Ethiopian Famine, Exxon Valdez;
• 1990-1999 - Internet, Nelson Mandela, Operation Desert Storm, Waco, O.J. Simpson, Oklahoma City Bombing, Princess Diana, Y2K.
Important developments, events and achievements
Science and technology
• The assembly line and mass production of motor vehicles and other goods allowed manufacturers to produce more and cheaper products. This allowed the automobile to become the most important means of transportation.
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