The Atlantic slave trade had a negative impact on the African societies and long term impoverishment of the west Africans. For some it intensified effects already present among its rulers and kingdoms
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Sanger felt that in order for women to have a more equal footing in society and to lead healthier lives, they needed to be able to determine when to bear children. She also wanted to prevent so-called back-alley abortions, which were common at the time because abortions were illegal in the United States.
Generally speaking, industrialization greatly reduced social inequality by creating a "middle class" of people, who were able to significantly increase their incomes due to the large number of jobs available in factories.
This quote comes from the now famous Four Freedoms speech, delivered by Roosevelt as the State of the Union address on January 6, 1941. The international context was very negative. Hitler and his Axis allies were winning in Europe. Britain was greatly menaced and the Japanese were gearing up for all-out war in the Pacific and in Asia.
Roosevelt, aware that scientific progress had eliminated the physical advantage of the USA being separated from Europe and Asia by such vast expanses of water had been arming and funding the British for years and had also increased military spending and the Navy in order to keep Japan at bay.
He knew that once Hitler had conquered Europe and Japan had conquered the East, all the populations and resources of these vast reasons would be used to directly attack the USA, which would eventually find itself in numeric inferiority so in order to prevent such a dark future he chose to send weapons, supplies and money to the British.
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Explanation:
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).