Edwin Klopfer was 13 years old when Albert Einstein publishes his first paper on the special theory of relativity. Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science. He is best known to the general public for his mass–energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory.
Edwin Klopfer was 22 years old when Archduke Franz Ferdinand and his wife, Sophie, Duchess of Hohenberg, were assassinated by a Yugoslav nationalist named Gavrilo Princip in Sarajevo, sparking the outbreak of World War I. Archduke Franz Ferdinand, Archduke of Austria-Este was a member of the imperial Habsburg dynasty, and from 1896 until his death the heir presumptive (Thronfolger) to the Austro-Hungarian throne. His assassination in Sarajevo precipitated Austria-Hungary's declaration of war against Serbia, which in turn triggered a series of events that resulted in Austria-Hungary's allies and Serbia's declaring war on each other, starting World War I.
Edwin Klopfer was 28 years old when The Nineteenth Amendment to the United States Constitution was ratified, guaranteeing women's suffrage in America. The Nineteenth Amendment to the United States Constitution prohibits the states and the federal government from denying the right to vote to citizens of the United States on the basis of sex. It was adopted on August 18, 1920.
Edwin Klopfer was 47 years old when World War II: Nazi Germany and Slovakia invade Poland, beginning the European phase of World War II. World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier. The vast majority of the world's countries—including all of the great powers—eventually formed two opposing military alliances: the Allies and the Axis. It was the most global war in history; it directly involved more than 100 million people from over 30 countries. In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease and the only use of nuclear weapons in war.
Edwin Klopfer was 49 years old when World War II: Nazi Germany invades the Soviet Union in Operation Barbarossa. Nazi Germany is the common English name for Germany between 1933 and 1945, when Adolf Hitler and his Nazi Party (NSDAP) controlled the country through a dictatorship. Under Hitler's rule, Germany was transformed into a totalitarian state that controlled nearly all aspects of life via the Gleichschaltung legal process. The official name of the state was Deutsches Reich until 1943 and Großdeutsches Reich from 1943 to 1945. Nazi Germany is also known as the Third Reich, from German Drittes Reich, meaning "Third Realm" or "Third Empire", the first two being the Holy Roman Empire and the German Empire. The Nazi regime ended after the Allied Powers defeated Germany in May 1945, ending World War II in Europe.
Edwin Klopfer was 63 years old when Disneyland Hotel opens to the public in Anaheim, California. The Disneyland Hotel is a resort hotel located at the Disneyland Resort in Anaheim, California, owned by the Walt Disney Company and operated through its Parks, Experiences and Consumer Products division. Opened on October 5, 1955, as a motor inn owned and operated by Jack Wrather under an agreement with Walt Disney, the hotel was the first to officially bear the Disney name. Under Wrather's ownership, the hotel underwent several expansions and renovations over the years before being acquired by Disney in 1988. The hotel was downsized to its present capacity in 1999 as part of the Disneyland Resort expansion.