Samuel L. Lewis also known as Murshid Samuel Lewis and Sufi Ahmed Murad Chisti was an American mystic and horticultural scientist who founded what became the Sufi Ruhaniat International, a branch of the Chishtia Sufi lineage. After a lifetime of spiritual study with teachers East and West, primarily Inayat Khan and Nyogen Senzaki, Lewis was recognized simultaneously as a Zen master and Sufi murshid by Eastern representatives of the two traditions. He also co-founded the Christian mystical order called the Holy Order of Mans. His early interest in international seed exchange and organic agriculture also established him as one of the pioneers of green spirituality. His most enduring legacy may be the creation of the Dances of Universal Peace, an early interspiritual practice that has spread around the world in the 50 years since his passing.