This article presents the main authors of the "connected histories" school, a view of modern globalization and its qualitative approaches based on documentary sources which work with "microhistories" which avoid the rigidity of economic and sociological theorists, without excluding them, however. The author insists on the importance of the Black slave trade and the connections among all of its actors, as well as the need to understand non-Western conducts, a subject traditionally limited to anthropology, on the basis of a study of the clash between European mercantile colonialism and the native nations of the northwest coast of North America (18th-19th centuries).