Introduction. Legal history and mass migration: paths and methods;??Section I: Discourses;??1. From Vitoria to Kant: a genealogy of ius migrandi;??2. Emigration and colonisation. The debate in Italy at the end of the nineteenth century;??3. Leaving Italy. Transoceanic migration and legal discourse in the city of Napoli (1901-1910);??4. The peculiar paradox of the criminalisation of Italian immigrants in Argentina in the late nineteenth century;??5. The Kaleidoscopic 1905 of Mr. Justice Oliver Wendell Holmes. What two unrelated opinions could tell us about immigration law, American jurisprudence, and twentieth century exceptionalisms;??Section II: Policies and institutions;??6. The routes of child labour: juvenile emigration and police regulations between the nineteenth and twentieth centuries;??7. The Societ? Umanitaria and Italian continental emigration: the entanglement between private regulation and official law;??8. A first note about migrants and Italian legal devices against maritime syndicates in the early twentieth century;??9. Changes in State and federal law and police against Italian organised crime: the New York case (1904-1914);??10. Refugee scholars from Nazi Germany and the impact of migration: what changed in the work of legal academics in exile and why?;??Section III: Legal practices;??11. The only living Italian in Tianjin. Colonial governance and Sino-Italian relations at the beginning of twentieth century;??12. Attracting colonists from abroad: migration and legal regulation of labour in nineteenth century Brazil;??13. Justice and emigration: Italian emigrants and legal protection between the nineteenth and twentieth centuries;??14. The protection of migrants in Italy in the proceedings of the Central Arbitration Commission for Emigration (1915-1929);??15. Spanish republicans exiled in France: second-class Europeans for the French government;??16. Exceptionality and common featurls'