Loofs studied theology at the universities of Leipzig, Tübingen, and Göttingen, and received his doctorate from Leipzig in 1881. As a student, Adolf von Harnack (Leipzig) and Albrecht Ritschl (Göttingen) were important influences to his career. From 1888 to 1926 he was a professor of church history at the University of Halle, where in 1907/08 he served as rector.[1] Concurrent with his work at the university, from 1890 to 1925, he held title of Consistorialrat in the city of Magdeburg.[2]
In 1886, he was co-founder of the journal Die Christliche Welt ("The Christian World").[1]
Leitfaden zum Studium der Dogmengeschichte, 1890 – Guide to studying the history of dogma.
Anti-Haeckel : eine Replik nebst Beilagen, 1900 – Anti-Haeckel: a replica with supplements.
Grundlinien der Kirchengeschichte : in der Form von Dispositionen für seine Vorlesungen, 1901 – Elements of the Church's history in the form of disposition of lectures.
Paulus von Samosata, eine Untersuchung zur altkirchlichen Literatur- und Dogmengeschichte, 1924 – Paul of Samosata, a study of Early Christian church literature and history of dogma.[5][6]