The resulting amalgam - an exotic mixture of European, Caribbean, African, and American elements - made Louisiana into perhaps the most seething ethnic melting pot that the nineteenth century world could produce. This cultural gumbo would serve as breeding ground for many of the great hybrid musics of modern times; not just jazz, but also cajun, zydeco, blues, and other new styles flourished as a result of this laissez-faire environment. In this warm, moist atmosphere, sharp delineations between cultures gradually softened and ultimately disappeared.
Ted Gioia, The History of Jazz
music