My son just graduated (BS in Business/Accounting) from a fairly leftist CA public college (they are all pretty leftist in CA), and told me that he took a lot of philosophy courses (minored in it) because that’s the one liberal arts field that hasn’t yet been ruined by the left.
They still read and study Plato, Aristotle, etc.
Socrates remains as one of the greatest teachers of all time. His dialogs are stellar examples of critical thinking and should be taught even in high school.