1868-1963 african-americanhistory africanamericanarts africanamericanauthors africanamericans africanamericansinliterature americanhistory americanliterature art civilization civilrights culture dubois encyclopedias harlemrenaissance intellectuallife literature maxims modernism music pan-africanism peace philosophy quotations racerelations racialidentity slavery socialhistory socialvalues spirituality twentiethcenturyamerica twentiethcenturyauthors war women