Indian Yoga Master Shri B.K.S. Iyengar (14 December 1918 – 20 August 2014), whose mastery of asana and pranayama were beyond compare, is widely recognized as the most influential yoga teacher in the modern world. He was the author of several books, including the seminal Light on Yoga, the bible of modern yoga and the definitive guide to the practice and philosophy of yoga. During 75 years of teaching B.K.S. Iyengar perfected a method of practice and instruction that makes yoga safe and accessible for all ages, body types and levels of fitness, excluding no one.
B.K.S. Iyengar introduced the emphasis on correct form in asana. With this in mind, he introduced the use of yoga props, now widely employed by most styles of yoga. He also developed yoga's therapeutic applications to a highly refined science. Among numerous international awards and accolades, in 2004 B.K.S. Iyengar was named one of the 100 most influential people of the 20th century by Time Magazine. His work has been incorporated into many other kinds of yoga and disciplines such as dance, body work and physical therapy.