Walter Jacob Hollenweger (June 1, 1927 – August 10, 2016) was a scholar of global Pentecostalism and interdisciplinary Reformed theologian. Growing up in a Pentecostal church in Zurich, Switzerland, he became well acquainted with the various facets of revivalist Christianity. He was active as youth leader, evangelist, author of articles, and interpreter at large events. He was ordained by the Swiss Pentecostal Mission and worked in that denomination until 1958. Personal tensions with the local church leadershi…