And for qualitative- here is the background on Phenomenology- seems like everything eventually leads to Germany/France. Edmund Gustav Albrecht Husserl I know, interesting person…. Heidegger I think was his student and often cited- but lots
of drama at that time around the National Socialist takeover of academia and people having to choose sides- and depending on who you talk to- he may or may not be a good guy. Sartre was a French Marxist and helped provide some of the foundations of critical
theory, and depending on who you talk to- is a good guy or a bad guy- Merleau-Ponty was also a French Marxist- but I don’t know him as well…MDB
https://en.wikipedia.org/wiki/Phenomenology_(philosophy)
The term phenomenology derives from the Greek φαινόμενον, phainómenon ("that
which appears") and λόγος, lógos ("study"). It entered the English language around the turn of the 18th century and first appeared in direct connection to Husserl's philosophy in a 1907 article in The
Philosophical Review.[8]