Fritz Sage Darrow was born in Rochester, New York in 1882 to Charles E. and Isabel Sage Darrow. He graduated from Harvard University (A.B., 1903, A.M., 1904, PhD, 1906) and earned many scholastic honors there including Harvard College Scholar (1902), John Harvard Scholar (1903), and Charles Eliot Norton Fellow. He was a Member of the American School of Classical Studies, Athens, Greece (1903-1904A)

Darrow served as instructor of Classical Archeology in the Harvard Summer School (1906), Adjunct Professor of Greek at Dickenson College (1906-1907) and Professor of Greek at Drury College (1907-1910). He sought to write the definitive life of Francis Mecurius van Helmont (1614-1698), a 17th century alchemist, cabbalist and physician.

Also a prominent Theosophist, Darrow was the author of many works about that philosophy. He lived with his wife and children for a time at the International Theosophical Headquarters in Point Loma, California. After divorcing from his wife in 1919, Darrow returned to Rochester where he remarried and became director of the Rochester Business Institute. He died in 1929.