Wars have occurred numerous times in the past due to different things, such as fighting over land, reforms, or simply hatred for each other. After wars, treaties are signed or agreements are made; for example, the Treaty of Versailles was signed after World War I. Even during wars different events and battles occur to win the war or take control. During the American Revolutionary War, battles between the Americans and the British took place mainly in the 13 colonies, controlled by the British, and the Americans fought for their independence. The Americans eventually gained independence from the British. This is an example of cause and effect of war. The causes of the Second World War were multiple, including mainly Hitler who wanted to conquer all of Europe and make it his own, and Germany, Italy and Japan who conquered their neighbors (Ellis and Esler, 925-929). After World War II, Germany, Japan, and the Allies learned to get along after multiple events of World War II and this still affects the world today. The Germany of World War II was completely different from the Germany that exists today. At the time, Hitler was the official dictator hungry for power and land. He wrote the book Mein Kampf, which describes racism and hatred towards Jews, known as anti-Semitism, and is currently banned in Germany. His book contained a lot of anti-Semitic propaganda and explained how he intends to conquer the world and make “Germany” the capital. Because he despised the Jews so much, he ordered Nazi soldiers to kidnap them and send them to their deaths in concentration camps, and this is considered genocide against the Jews. In the camps, Jews were worked, starved, and sent to gas chambers due to the ongoing Arab-Israeli conflict. In Japan and Germany everything was in ruins and dilapidated due to bombings and invasions. Germany was still divided between freedom in the west and communism in the east (Ellis and Esler 955). Communism had spread to several countries, this is known as the domino theory, and this leads to the Cold War (Ellis and Esler 993). The Cold War, a period of time that involved tensions between the Allies and the Soviet Union; it was fundamentally a fight against communism since its spread (Ellis and Esler 954). After the Cold War, Berlin was demolished and communism was swept away in Germany while some countries retained it as the standard mode of government (Ellis and Esler 1004-1006). Today only five communist countries remain, and most of the countries have adopted democracy. After the Second World War things were certainly never the same again.