To the best of my knowledge the answer is: an union founded in 1869, The Knights of Labor, is considered to be the first industrial union which admitted skilled and unskilled workers, women, and African‐Americans. This inclusive policy contributed to its growth, and the union boasted more than 700,000 members by the mid‐1880s. The program of the Knights of Labor was involved both reform ideas and specific worker demands. It was led by Terence V. Powderly, and they welcomed unskilled, semi-skilled, and skilled workers into their ranks as well as immigrants, African Americans and women.
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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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Greeks/Greece based many of their medical beliefs on Egyptian findings.