Some of the reading and rereading I've been doing this summer has made me think about a class I took in college--one I've long regarded as the most influential of the courses I took outside of my major.
Spring semester of my senior year I took a history class (cross-listed with at least two other departments) entitled "20th-Century European Intellectual and Cultural History." It was taught by a brand-new assistant professor, and it was even more overloaded than that mouthful of a title suggests: running from about 1880 to about 1980, focusing primarily on France and Germany but also their influence on British and American culture, the course included philosophy, poetry, political theory, a couple of novels--as well as optional weekly movie screenings (M, Metropolis, Triumph of the Will), slide shows (of art, architecture, furniture), and so much more. It started with Nietzsche, Freud, and Baudelaire, and ended with Arendt and Cixous.
I took some amazing literature classes, of course, and they, along with a couple of classes in Early Modern history, led directly to my eventual chosen profession and my subfield within that profession. But I think about or draw upon the things I learned in 20CEICH probably nearly every week, though it's not in any obvious way related to anything I work on. Only one other out-of-field course I took in college even comes close to it in terms of its influence (Post-War American Political History, if you wanna know).
I have a couple of theories as to why this class or these two classes proved so intellectually important to me. But first, I'm curious: what are the most influential classes you took in college, outside your major field(s) of study, and what has made them so enduringly important?