Personality Type

Scholars in the humanities and social sciences seem absolutely obsessed with the categories of race, gender, and sexual orientation (and to a lesser extent social class, although old-school Marxism isn’t as cool as it once was). But I wonder if we don’t need to open new avenues of inquiry. As far as I’m aware, no one has analyzed any historical situation according to the enneagram or the Myers-Briggs Type Indicator, even though personality type is far more useful in explaining human behavior than it’s given credit for.