The electrification of the guitar after World War II led to social dance forms known as blues dancing. There was a high level of energetic improvisation between dancers and the music. Eventually blues dancing transitioned into R&B dancing. In the 50s, a youth movement occurred as the young white community embraced African-American music and dance. Then out of the 60s, disco emerged, which was followed by the hip-hop culture. At the same time, African-American performance dance became part of the modern dance movement with such dance luminaries as Katherine Dunham, Alvin Ailey, and Misty Copeland. Part of "The Genius of African-American Dance" series. Please note this title contains mature themes.