Evolution. Its a process measured in eons. But every so often, when a historic juncture is reached and critical mass achieved, evolution takes a breathtaking leap forward. In one moment, things are as they always were. In the next, they will never be the same again.

San Francisco. 1965. It was a time and place where the potent charge of rock & roll hotwired an epochal transformation, a generational shift that set the world wobbling. Music was an express agent of that change, articulating and animating the social and spiritual convulsions shredding the air.

But as much as music was the midwife of sixties revolution, it was also being revolutionized, goosed up the evolutionary ladder by a once-in-a-lifetime assemblage of pilgrims and pioneers, staking out new frontiers of consciousness along the rugged Western edge.