I was very pleased with my post on this topic, making the point that standard microeconomic analysis only works properly on the assumption that the economy is at a full employment equilibrium.
But, it turns out, exactly the same point, using the same title, was made by David Colander 20 years ago
Colander (1993), The Macrofoundations of Micro, Eastern Economic Journal, Vol. 19, No. 4 (Fall, 1993), pp. 447-457
And he wasn’t the first. The term and the idea have a long history, including a contribution by my UQ colleague Bruce Littleboy
The term macrofoundations, I suspect, has been around for a long time. Tracing the term is a paper in itself. Axel Leijonhufvud remembered using it in Leijonhufvud  . I was told that Roman Frydman and Edmund Phelps  used the term and that Hyman Minsky had an unpublished paper from the 1970s with that title; Minsky remembered it, but doubted he could find it and told me that he used the term in a slightly different context. I was also told by Christof Ruhle that a German economist, Karl Zinn, wrote a paper with that title for a Festschrift in 1988, but that it has not been translated into English. I suspect the term has been used many more times because it is such an obvious counterpoint to the microfoundations of macro, and hence to the New Classical call for microfoundations. While he does not use the term explicitly, Bruce Littleboy , in work that relates fundamentalist Keynesian ideas with Clower and Leijonhufvud’s ideas, discusses many of the important issues raised here.