Measures taken by groups such as the United Nations to try to prevent genocide following World War II included making the crime of genocide punishable under international law. The United Nations approved its Convention on the Prevention and Punishment of the Crime of Genocide (CPPCG) in 1948 which was later on ratified by more than 130 countries. However, this did not prevent future genocides such as in Yugoslavia and Rwanda
First, a judge may write a dissent to persuade the majority, and the dissenting opinion may ultimately become the majority opinion. Second, a dissent can improve the majority opinion by pointing out the majority's mistakes either in its description of the facts, the law, or in its reasoning
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