Thanissara, from London, was a nun for 12 years in the tradition of Ajahn Chah and has taught internationally for over 30 years. She is co-founder of Dharmagiri Sacred Mountain Retreat, South Africa, Sacred Mountain Sangha, California, and Chattanooga Insight, Tennessee. She has an MA in Mindfulness Psychotherapy Practice from the Karuna Institute UK and is co-author of Listening to the Heart, A Contemplative Guide to Engaged Buddhism, author of Time To Stand Up, An Engaged Buddhist Manifesto for Our Earth, and several books of poetry. She is a member of the Teacher Council at Spirit Rock and co-guiding teacher of Sacred Mountain Sangha.
Yanai Postelnik has been engaged in full-time dharma practice and service since 1990. He is inspired by the Thai forest tradition and nourished by time spent in nature, and has been teaching retreats around the world for over 25 years. Yanai is a member of the Guiding Teacher Council of Gaia House, in Devon, England, and of the Core Faculty of Insight Meditation Society, Massachusetts. Since 2018, Yanai has been engaged with Extinction Rebellion, seeking to bring about urgent change in the face of the climate and ecological emergency, in the service of all beings.