Robert Aitken Rōshi was a Zen teacher in the Harada-Yasutani lineage. He cofounded the Honolulu Diamond Sangha in 1959 together with his wife, Anne. Aitken received Dharma transmission from Koun Yamada in 1985. He was a social activist advocating for social justice throughout his life, and was one of the original founders of the Buddhist Peace Fellowship. He’s the author of Zen Master Raven and several other books. He died in 2010.