In October, I'll be teaching yoga history and philosophy on a teacher training course in London. There'll be 15 hours of classes over two days (22 / 23 October), exploring what we know about the evolution of practice from the distant past to the present day. This essay gives a brief introduction to what to expect. The photo shows Jim Mallinson, with whom I've been studying at SOAS as part of my MA in Traditions of Yoga and Meditation.