Oscar Ichazo was born on 24 July 1931 in Roboré, Bolivia. By his own account he suffered health crises as a child that pushed him toward introspection, and as a young man he traveled widely through Asia and the Americas, studying under a range of teachers in traditions including Sufism, Zen and other schools of Buddhism, yoga and the Fourth Way teaching associated with George Gurdjieff. He synthesized what he had studied into his own structured teaching, which he began to formalize while based in Chile in the late 1960s.
In 1970 he led an intensive ten month training program for a small group of roughly fifty students in the northern Chilean city of Arica, from which the school took its name. Several participants in that training, including the Chilean born psychiatrist Claudio Naranjo, carried elements of the teaching back to the United States, where it spread through the human potential movement centered at institutions such as the Esalen Institute. Ichazo relocated to New York and founded the Arica Institute there in 1971 to teach and formalize the system directly. He died on 26 March 2020 in Kihei, Hawaii, at eighty eight.
Ichazo largely withdrew from public teaching in his later decades while the Arica Institute he founded continued operating training programs under other senior teachers, and he remained based for much of his final period on Maui, Hawaii, where he died. His personal archive of unpublished lectures and course material remains under the Institute's stewardship rather than in general circulation, which is part of why independent biographical detail on him beyond his own interviews and the Institute's own materials stays comparatively thin.