Identify the аuthоr аnd title оf the wоrk: Tаke Harlem as an instance of this. Here in Manhattan is not merely the largest Negro community of the world but the first concentration in history of so many diverse elements of Negro life. It has attracted the African, the West Indian, the Negro American; has brought together the man from the city and the man from the town and village; the peasant, the student, the businessman, the professional man, artist, poet, musician, adventurer and worker, preacher and criminal, exploiter and social outcast. Analyze the passage in terms of its historical context.