TIMELINE OF THE WORLD

1914 World War I starts

1918 World War I ends; influenza epidemic kills an estimated 20–40 million people around the world

1920 Women win the right to vote

1928 Penicillin discovered

1929 US stock market crashes, setting off the Great Depression

1932 Scientists split the atom

1937 The Hobbit by J. R. R. Tolkien published

1939 World War II starts

1945 US drops atomic bombs on the Japanese cities of Hiroshima and Nagasaki; World War II ends

1947 The Diary of a Young Girl by Anne Frank published

1952 Dwight Eisenhower elected president of the United States, Charlotte’s Web by E. B. White published

1955 Polio vaccine announced

1960 John F. Kennedy elected president of the United States

1972 Widespread use of DDT banned