Didrik Muus (1858-1937) was a Norwegian theologian and educator. He is primarily known for his involvement in the fundamentalist controversy within the Lutheran Church in the United States during the late 19th and early 20th centuries.
Muus was born in Norway and emigrated to the United States, where he became a prominent figure in the Hauge Synod, a conservative Lutheran body. He served as a professor at Augsburg Seminary in Minneapolis, Minnesota.
Muus was a staunch defender of traditional Lutheran doctrine and a vocal critic of theological liberalism and what he perceived as modernizing trends within the church. He actively opposed the introduction of higher criticism of the Bible and advocated for a strict interpretation of the Lutheran Confessions.
His uncompromising stance led to significant conflict and division within the Hauge Synod, culminating in a formal schism. Muus and his supporters eventually formed a separate synod, commonly referred to as the "Synod for the Norwegian Evangelical Lutheran Church in America," which maintained a more conservative theological position.
Muus’s career reflects the broader theological debates and tensions within American Lutheranism during a period of significant social and intellectual change. His legacy is primarily associated with his commitment to confessional Lutheranism and his resistance to perceived theological deviations.