STARBUCK, E. D. (1866–1947), was a prominent figure in the early academic study of the psychology of religion in the United States and the first scholar to use the phrase "psychology of religion." Edwin Diller Starbuck was born in Indiana to a devout Quaker farming family. After undergraduate work at Indiana University, he went on to Harvard University, from which he received his master's degree in 1895, and then to Clark University, where in 1897 he received his doctorate. In 1890 he was stirred by F. Max Müller's Introduction to the Science of Religion and decided to start studying religion. In 1893, at Harvard, he circulated two questionnaires, one on sudden conversion and the other on "gradual growth" toward religious commitment. In 1894 and 1895 he presented papers on his research before the Harvard Religious Union. After graduating from Clark University, he remained there as a fellow in the late...