Answer:
Much of his research concerned the sociology of the family (with focus on courtship and divorce), sociology of education (pioneering the analysis of schools as social institutions) and the sociology of the military (with focus on veterans). He coined the term principle of least interest. His most notable studies include The Sociology of Teaching (1932), described as an "early classic" in the sociology of education. Before his sudden death, he was recognized as one of the most prominent scholars in the field of sociology.
Step-by-step explanation:
I got it right on edge:)