Historians often rely on both primary and secondary sources when supporting an argument, since it's important to use secondary sources to put the argument in context, and primary sources in order to make an original point.
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The Caste System is a class structure that is determined when you are born. If you are born into a poor family, then you too are poor.
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Because the united states was a large influence in other nations succession from nations the states feel as if they are needed for or a influence on the other nations. Also if the nation does gain independence good trade and a partnership may form.
Well, the Holocaust had a lot of impact. During the Holocaust, it is estimated that 24,000 jews died from the Nazi's control. It definitely impacted their population. It impacted how they live also. They could no longer live in peace, they had to hide or disguise themselves as Nazi followers. Hope this helped :)