I don't think he would qualify as a Marxist, but you might find some of the Structural-demographic theory work interesting, in terms of considering economic factors as a determinant of well being. For example the double spiral[1] of well being and elite overproduction is a pretty compelling chart. It also in a way addresses a lot of the same ground as wtfhappenedin1971 in terms of changes in trend.

[1] https://peterturchin.com/age-of-discord/