World war 2 ended in 1945
During the first industrial revolution, the affected nations moved from a rural economy, based on agriculture and trade, to an urban, industrialized, mechanized, simplified and, thus, overcrowded economy. In 1800 it was possible to have a sustained growth of wealth that allowed the transition to a wide use of innovative machines, especially in transport and work, abandoning animal traction and production based on manual labor.
During the second industrial revolution The exponential development of railways, while structuring a new model of international trade based on the specialized production of each country and the exchange of materials from standardized prices, also enabled huge migratory movements, like boiler boats that even transported large masses of people on intercontinental trips, as was the case of the 55 million Europeans who migrated to North America between 1850 and 1940.
The cause of the great migrations during the second industrial revolution was, mainly, the tremendous demographic growth that there was in Europe during the eighteenth century, which in turn had different causes.
The Preamble quote that most specifically refers to natural rights: "[T]hey are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”
John Locke was one of the first of the Enlightenment era philosophers. The Enlightenment's emphasis on reason was in contrast to superstition and traditional beliefs. The Scientific Revolution had shown that there are natural laws in place in the physical world and in the universe at large. Applying similar principles to matters like government and society, using reason will guide us to the best ways to operate politically so as to create the most beneficial conditions for society. This included a conviction that all human beings have certain natural rights which are to be protected and preserved. Locke's ideal was one that promoted individual freedom and equal rights and opportunity for all. Each individual's well-being (life, health, liberty, possessions) should be served by the way government and society are arranged.
Answer:
Hitler signed the Nazi-Soviet Non-Aggression Pact with Stalin in August 1939. Both the Soviet Union and Germany promised not go into war with each other for ten years.