Identify the author or document of the following primary source quote: "In the last decade something beyond the watch and guard of statistics has happened in the life of the American Negro. The Sociologist, The Philanthropist, the Race-leader are not unaware of the New Negro but they are at a loss to account for him. He simply cannot be swathed in their formulae. For the younger generation is vibrant with a new psychology; the new spirit is awake in awarded the masses, and under the very eyes of the professional observers is transforming what has been a perennial problem into the progressive phases of contemporary Negro life."Langston HughesAlain Locke Sinclair Lewis, Main StreetErnest HemingwayF. Scott Fitzgerald

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