Frew represented CoG (with Deborah Ann Light) at the Global Summits held at Stanford University to create the Charter for a new interfaith organization – the United Religions Initiative. In 2000 he attended its charter signing ceremony in Pittsburgh PA. In 2002 he was elected to the URI's first Global Council (Board of Trustees), becoming the first Neopagan to serve on the board of a global interfaith organization. The United Religions Initiative has grown to be the largest grassroots interfaith organization on Earth, involving over 2.5 million people involved in over 650 Cooperation Circles in 86 countries and Frew has stayed closely involved. He was appointed an At-Large trustee in both the second and third terms of the URI's Global Council, and a Continuing Trustee in its fourth term. Frew helped found many URI Cooperation Circles, including the Spirituality & the Earth CC (S&ECC) which he coordinates. It has been hosting annual "People of the Earth", conferences at the Interfaith Center at the Presidio since 2008; has arranged for English lessons, computer training, and video training for Latin American indigenous representatives involved in interfaith work, and maintains a website to assist with their networking efforts. With the Expressing the URI in Music & the Arts CC (EURIMA) Frew helped create One World, Many Voices, one of the first interfaith songbooks; the first Interfaith Sacred Space Design Competition resulting in 160 designs submitted from teams in 17 countries and edited the final book, Sacred Spaces . In 2000 Frew was appointed to the board of directors of the Interfaith Center at the Presidio (ICP), becoming the first Neopagan to serve on the board of a regional interfaith organization. The ICP is a consortium of over a dozen interfaith councils, seminaries, and interfaith organizations in the San Francisco Bay Area that work together to maintain a permanent site for ongoing interfaith work in the Presidio's Main Base Chapel. Research on origins of Wicca Frew is a leading proponent arguing that modern Wicca stretches back to the paganism of Classical Antiquity. Frew finds a genuine antiquity to core cosmological concepts and liturgical elements in Gardnerian Craft. His work focuses on parallels between Gardnerian Wicca and the theurgy of the later Neoplatonists. While the definitive text is in production, he has presented talks and papers on this subject in a number of Pagan venues, including: "Crafting the Art of Magic: A Critical Review", serialized