What makes Zarthus by Robbie Basho notable?

'Zarthus' is notable for its innovative blend of folk, classical, and Eastern musical traditions, contributing to the development of the new age genre. Its critical reception highlighted Basho's unique approach to fingerstyle guitar and lyrical depth, influencing subsequent generations of musicians exploring similar spiritual themes. By the time Robbie Basho released 'Zarthus' in 1974, he was already recognized as a pioneer of American primitivism, following his breakthrough album 'The Voice of the Turtle' (1967). This album marked a significant evolution in his style, incorporating more complex arrangements and influences from Eastern philosophy, which reflected his artistic growth during this period.