Distribution of income refers to the way that national income is divided among households in the economy.
Answer:
The black death came from fleas. Rats in China had these fleas, and they found their way to Europe. The black death spread so easily because a) there was no proper hygiene, b) cities were often crowded and animals would walk around the streets with humans, c) the 'treatments' that doctors had really didn't have anything to do with the black death. In the end, the black death ended up killing 1/3 of Europe's population and was actually one of the reasons why the feudal system ended.
The Second World War was the event that shook the world in those years. France was a country involved in the conflict and the forces of the axis caused many deaths between 1939 and 1945. Many of those deaths were men, regardless of age. For this reason, there is clearly a general decline of men in the pyramid population of France in the 50s.
On June 29, 1892, workers belonging to the Amalgamated Association of Iron and Steel Workers struck the Carnegie Steel Company at Homestead, Pa. to protest a proposed wage cut. ... The Homestead strike led to a serious weakening of unionism in the steel industry until the 1930s.