geauxtohell
Choose your weapon.
I don't hold a phd in history. That degree is not required to be a "professor". Just ask Harvard University who says Obama is a constitutional law professor although he holds no advanced degrees in the field. I have a Masters in Business Administration supported by 24 years of business experience, and a Bachelor's in history. I am qualified to teach all business related undergraduate courses and non-degree related course in history (specific to American and ancient history)
Obama has a doctoral degree which is considered the entry qualification to teach at most universities. You do not. If a published JD isn't qualified to teach law, then who is? You may teach university level history, but you certainly aren't an expert.
Sigh. Actually that's incorrect. A master's degree is the entry qualification. Accreditation requires that an instructor have a degree one level higher than the degree for which they are teaching in regards to a major field. So someone with a masters is qualified to teach bachelor level courses. Someone with a bachelor's in history (for example) can teach bachelor's level courses only if the students are not history majors and/or the teacher holds a given level of credits in that field of study (which I do). A PhD is required to teach graduate courses and can sometimes determine tenure or the rank of the professor. Universities obviously prefer instructors with a PhD, but routinely employ those without one as well (though they often encourage the instructor to pursue their PhD after being hired).
The term "professor" is dependent upon usage. With a capital P it's a formal title and usually indicates a PhD. With a lower case p it indicates any instructor at the college level.
As far as my expertise, I suppose you are free to draw your own conclusions, but if it's good enough for Arizona State and the University of Oregon I imagine it ought to be good enough for USMB.
Except you don't have a graduate degree in history. My wife does (masters). She could teach (and did) at smaller universities but not at more prestigious ones which wanted a phd.