To a greater extent than still widely assumed, the German scholar Aby Warburg drew, throughout his life, on the lessons of two of its early episodes: his travels of 1895&;96 among Pueblo Indian communities in the North American Southwest, and his residence of 1896&;97 in Berlin, which he prized as a center for the study of ethnography, ethnology, and anthropology. Over the next three decades, this pioneering thinker was able to affect a fruitful amalgamation of those disciplines with that of art history (in which he had himself been trained): the origin of a form of cultural studies that continues to exert an extraordinary intellectual allure. Quoting from Warburg&;s diaries, notebooks, and correspondence, this newly translated study throws fresh light on a most eventful journey through the realm of ideas.