Fuller Theological Seminary is an accredited Christian educational institute with its main campus in Pasadena, California and several satellite campuses in the western United States. The seminary has over 4,300 students from over 67 countries and 108 denominations, and has been described as "arguably the most influential, by number of pastors and educators trained..." Fuller Theological Seminary was founded in 1947 by Charles E. Fuller, a radio evangelist known for his "Old Fashioned Revival Hour" show, and Harold Ockenga, the pastor of Park Street Church in Boston. With its founding, the seminary's founders sought to reform fundamentalism from its separatist and sometimes anti-intellectual stance of the 1920-40 era. Fuller envisaged that the seminary would become "a Caltech of the evangelical world." Most of the earliest faculty held to theologically and socially conservative views, though professors with differing perspectives arrived in the 1960s and 1970s. There were tensions in the late 1950s and early 1960s as some faculty members became uncomfortable with staff and students who did not agree with biblical inerrancy.