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Independent researcher [[Michel Hervé Bertaux-Navoiseau]] divided nations by the prevalence of [[circumcision]]. He placed nations where more than 50 percent of males are [[circumcised]] in the first category. He placed nations where less than 50 percent of males are circumcised in the second category.He collected statistical data on rapes, </ref>{{REFdocument |title=Violence and Circumcision |url=https://www.researchgate.net/publication/358044554_Violence_circumcision |contribution= |last=Bertaux-Navoiseau |first=Michel H. |author-link=Michel Hervé Bertaux-Navoiseau |publisher=Research Gate |format= |date=2022-01 |accessdate=2022-11-09}}</ref>

* {{REFdocument |title=Violence and Circumcision |url=https://www.researchgate.net/publication/358044554_Violence_circumcision |contribution= |last=Bertaux-Navoiseau |first=Michel H. |author-link=Michel Hervé Bertaux-Navoiseau |publisher=Research Gate |format= |date=2022-01 |accessdate=2022-11-18}}