In 1967 the ARSS became the AACS which soon established the Institute. The first professor, called a Senior Member, appointed to serve the new Institute was Hendrik Hart who proceeded to teach worldview studies and philosophy, an appointment which later became specialized to Systematic Philosophy as the number of Senior Members grew. The student body also began to grow in numbers. A second Senior Member, James Olthuis who had graduated from Calvin Theological Seminary and received his doctorate from André Troost in philosophical ethics, received an appointment in ethics and philosophical theology. Then, in short order, because of a dispute at another institution in the United States, individuals in what may be called "the Chicago School" of thought within Reformational philosophy became available for ICS appointments: Calvin Seerveld in philosophical aesthetics, Arnold DeGraaff in psychology and education, and Thomas McIntire in history (abd). What marked this entire contingent was the strong emphasis on pursuing philosophy and the philosophical foundations of other disciplines, with intense historical depth.