what were the importance current events of the Harlem Renaissance's local,national and international influence during the 1930?

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http://www.britannica.com/EBchecked/topic/255397/Harlem-Renaissance

The influx of African Americans into Harlem represented one huge influence that created the Harlem Renaissance. The rich white people for whom Harlem was originally built moved North leaving behind a neighborhood that became a vibrant center for African American culture across all artistic fields. Important writers from WEB Dubois to Langston Hughes began to expose a new sensibility in literature and writing that was unknown to the general population. The writing often reflected the changes that happened post-Civil War and posited an existence which could or could not be the future. Obviously Black Monday, the Great Depression, the Roaring Twenties - all the major American events influenced the writers and artists of the Harlem Renaissance.