The term first came into widespread use in the 1920s, when a number of German-speaking theorists, most notably Max Scheler, and Karl Mannheim, wrote extensively on it.. 
Pearl Mae Bailey (March 29, 1918 – August 17, 1990) jẹ́ òṣèré àti akọrin ará Amẹ́ríkà.Ìtọ́kasíÀwọn Ọjọ́ìbí ní 1918awon ojoaláìsí ní 1990Àwọn Òṣèrin ara Ameriwon omo Afrika Amerikawon ara Amẹ́ríkà.. 