In what ways did both sides of World War 2 differ at the time in US history (social, political, and economic differences)?

The two sides during World War II, also referred to as the Second World War, were the Allied powers and the Axis powers. Also, please remember that the war was not just an event in American history, but an event in world history. I will focus on major players in the war because some countries, such as Denmark and Spain, were neutral. Spain had both German and British sympathizers in its government despite its own fascist regime. Other nations, such as Holland, were overtaken completely.
The Allied powers included the United States, Great Britain, France, the Soviet Union, Canada, Australia, New Zealand, India, and China. The most powerful nations in the Allied powers were the United States and Great Britain. Both were democracies, but the United States is a republic and Britain is a constitutional monarchy (for the purpose of your Venn diagram or compare-contrast essay, you can classify both as democracies, then put the distinction in parenthetical notes). Both nations, during the war, were led by strong men with big personalities—President Franklin Delano Roosevelt and Prime Minister Winston Churchill. However, Roosevelt died in office, so it was Harry Truman who made the decision in 1945 to drop nuclear bombs on Hiroshima and Nagasaki. Both countries thrived economically, due to industry, and women were involved in the war effort in both nations.
France, during World War II, was divided between a democratic government, led by Charles de Gaulle while he was in exile in Britain, and the Vichy regime, led by Marshal Philippe Petain. The Vichy regime was deemed "legitimate," due to the Nazi takeover of France in 1940. Northern France, including Paris, was occupied by the Germans, but central and southern France constituted Vichy France. Though there was an organized French Resistance that refused to recognize the Nazis, there were also many Nazi sympathizers in France. This information is revealed in a lot of detail in Marcel Orphuls's film The Sorrow and the Pity. Food was more difficult to come by in France than in the other two nations due to rationing, and the traffic of food was closely watched by the Nazis.
Jewish people and other minorities were very vulnerable throughout the continent but were safe in the United States and Great Britain. Jews who sensed the danger of Nazism left Germany before its occupation of Poland in 1939, which started the war in Europe. Britain took in 10,000 Jewish children from Germany, Austria, and eastern Europe nine months before the outbreak of the war in a rescue effort called the kindertransport. Others tried to leave after the Nazis rose to power.
With the exception of China and the Soviet Union, all of the remaining nations in the Allied Powers were democracies. China had been viciously overtaken by Japan's militarist regime. The Soviet Union was a Communist nation, which would place it in discord with Western democracies immediately after the war.
The Axis Powers included Germany, Japan, and Italy. Germany was the most powerful Axis member in the West, and its Nazi regime was notorious for its abuses of power and its initiation of concentration camps to contain and ultimately kill groups and people it had labeled "undesirable," including but not limited to Jews, Poles, Communists, Romani populations, homosexuals, and the mentally disabled.
Many Germans were fervently committed to the Nazi cause; the Nazis promised to revitalize industrial might (to revive an economy that had been sunk into debt after the First World War), to restore national pride (Germany had been blamed for the First World War), and to return to an idyllic vision of German life, which restored traditional gender roles and traditional notions of the family. Like Britain and the United States, Germany had a charismatic leader: Adolf Hitler.
Italy, too, had a fascist regime, which was led by Benito Mussolini. While Germany pursued land acquisitions in Europe, Italy annexed land in North Africa, including Somalia and Libya, and some lands in the Balkans, including Albania and Yugoslavia. It was Mussolini's intention to restore the lands of the Roman Empire, just as it was Hitler's intention to have a Third Reich, or a third great regime, in the pattern of the Holy Roman Empire and the German nation-state led by Bismarck.
All of the nations in the Axis Powers were ultranationalist totalitarian regimes. All of them were imperialist—that is, they had sought to acquire other lands. The Soviet Union was also a totalitarian regime under Communism. However, the Soviet Union was more progressive in its vision and had given women the right to vote in 1917. It had also encouraged equality between the sexes. Japan, like Germany, had ambitions to seize land. It annexed countries and islands throughout the Pacific, from Korea and China to Indonesia. They started their march to empire in the 1930s with the takeover of Manchuria. Like Germany, they were also guilty of violent atrocities, particularly in China, and, in a sense, had gone even further by legitimizing rape and keeping sex slaves in their occupied nations. In Korea, these women were referred to as "comfort women."
Both Germany and Japan were motivated politically and militarily by ideas of being a "superior race" of people. The Japanese occupied South Korea from 1910–1945 based on this notion and attempted to "make Korean people Japanese" by indoctrinating them with instruction in Japanese language and history and discouraging the instruction of the Korean language.
http://www.bbc.co.uk/history/worldwars/wwtwo/japan_quest_empire_01.shtml

https://www.theguardian.com/world/2009/sep/08/life-in-occupied-france-nazi