I did my undergrad in history and intended to go to grad school to pursue a PhD in history and ultimately be a professor of history… and sometime in my junior year I got my hands on an NSF report on what PhDs in various disciplines did post-degree. This was in 1985 and is possibly even worse today, but then, only 16% of history doctorates were working in a tenured or tenure-track academic position. The rest? I didn’t care. I wanted to PROFESS. My “minor” (we didn’t have minors at my college per se, but the discipline where I’d taken the second largest number of courses) was sociology, which I actually liked far more than history… and the corresponding figure was almost 70%! The highest percentage of any of the social sciences.
A PhD in sociology is very adaptable- you can teach, do market research and polling, do litigation consulting… there are no unemployed soc PhDs that I know of. Underemployed, perhaps, but it’s very much worth it.