Because Signe Anderson did the job ! At about 1966 she did have a baby
and quit the job as singer of JA. To have more time for her family ;
Daughter of Signe ; Lillith, 27/5/66. Father:- Jerry Anderson.
From a web site about Signe Anderson Biography:
One of the original members of Jefferson Airplane, Signe Toly was a respected solo jazz
and folk singer before joining the band. Soon after joining the Airplane, she married the
Matrix's lighting director (and former Prankster) Jerry Anderson. It was her departure in1966
, following the birth of her first daughter, which bought Grace Slick into the band.
Momentum for the band began to build as they started opening for Jefferson Airplane
and other successful local bands, with Columbia Records offering the Great Society a
recording contract. By the time the contract arrived in the mail, however, Grace had
been spirited away to replace departing vocalist Signe Toly Anderson in the Airplane,
taking "Somebody to Love" and her own composition "White Rabbit," one of
Great Society's live showcases, with her. As both the visual and musical focal point,
the band could not survive without its lead singer, and disbanded in the fall of 1966
Grace and Jerry would divorce as well.
The year IS 1966. I could post MUCH MORE ; 1966 nothing else.
One website could be wrong, but 6 or more ???
The Great Society broke up in late 1966, when Grace Slick left to join the
Jefferson Airplane. Surprisingly, considering that he considered himself a
filmmaker first, Jerry Slick then joined another San Francisco band,
the Final Solution. The Final Solution played modal early psychedelia with
some similarities to the Great Society, except their material was much
darker and not nearly as strong. Slick gave their arrangements a lot of input,
however, and the Final Solution even lifted excerpts of Great Society songs
to plug into Final Solution ones. While Slick was in the lineup, they made
some rehearsal tapes, and one of the songs, "Bleeding Roses," was issued
on a flexidisc that came with the first issue of the San Francisco
'60s rock fanzine Cream Puff War.
From Jerry & Darby Slick Answers.com ......