Answer:
This decade is clearly influenced by the economic crisis (called the "Great Depression") caused by the Crack of 1929, which had a global reach and caused strong social and political tensions that allowed the emergence of dictatorships such as that of Hitler in Germany, Franco in Spain or Metaxas in Greece. This emergence of totalitarianisms ended up in a new world war.
Germany is developing again, the economy is relaunched with the boost given by industry and state investment in infrastructure. The new Nazi regime gains numerous territories without firing a single shot, against which a policy of appeasement led by the western liberal democracies is opposed, which ultimately failed. The Japanese Empire was consolidating in Asia, affecting the interests of Europe and the United States, especially in the Pacific. Japan creates a "puppet state" in China under the name Manchukuo. For its part, Italy initiates a policy of military and expansive territorial rearmament that leads to the invasion of Ethiopia.
In the United States, President Franklin Delano Roosevelt led the country's economic recovery after the crisis caused by the Great Depression of 1929. Great Britain kept its political system practically unchanged, unlike France, which failed to consolidate a strong and bordered on civil war. After its transformation into the Soviet Union, Russia was the scene of endemic famines (such as the Ukrainian famine), political repression, and the Great Purge.
The partial failure of a coup d'état against the Second Spanish Republic led to the Spanish Civil War (1936-39), which bled Spain, turned it into a totalitarian state after the victory of the rebels and served as a preamble to the new great world war that was to come on the continent.
This decade can be considered to end on September 1, 1939, when Hitler (and days later Stalin) invaded Poland and the deadliest conflict in history began: World War II, which would mark the entire 1940s.
Explanation:
