Kalu Rinpoche was a Buddhist lama, meditation master, scholar and teacher. He was one of the first Tibetan masters to teach in the West.

The Shangpa Kagyu is known as the "secret lineage" of the Kagyu school of Vajrayana or Tibetan Buddhism and differs in origin from the better known Dagpo Kagyu schools. The Dagpo Kagyu are the lineage of Tilopa through his student Naropa, often traced through Naropa's famous student Marpa Lotsawa and thus called "Marpa Kagyu", while the Shangpa lineage descends from Tilopa's student Niguma, who was Naropa's sister, as well as from the teachings of Sukhasiddhi. Its founder was Khyungpo Naljor, the student of both women, whose monastery in the Shang Valley gave its name to the tradition.