The Crystal Mirror of Philosophical Systems , by Thuken Losang Chokyi Nyima (1737-1802), is arguably the widest-ranging account of religious philosophies ever written in pre-modern Tibet. Like most Tibetan texts on philosophical systems, this work covers the major schools of India, both Buddhist and non-Buddhist, but then goes on to discuss in detail the entire range of Tibetan traditions as well, with separate chapters on the Nyingma, Kadam, Kagyu,...