Hello!
The first elaborated law code was Roman. The romans build an Empire based on the advances in the legal system. The separation of public and private law, for example, can be seen in the US system. The common law developed by the roman is oficially used by the courts, like we can see by the terms: "<em /><em>habeas corpus, stare decisis</em>".
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Although the commercial activities of merchants gave rise to commercial cities and towns, these towns began to face unprecedented problems. These problems are similar to those faced by modern day urban cities; they included contagious disease, overcrowding and crime. Hope this helps. Have a nice day.
They were treated terribly. World war 2 started in 1939 and ended in 1945. Prior to that they were mistreated and blamed for the issues Germany faced. During 1935 and 45, Jews along with those who helped them and others who were deemed unfit for society, where rounded up and put into concentration camps. Hopefully this helps.