The Question of a Stagnant Marxism: Is Marxism Exegetical or Scientific Why is it that there exists a tendency in Marxism—itself a theory of change—that remains unchanging? Simoun Magsalin investigates. Perhaps some analogies are in order Among the medieval Jews, there was an interpretive tradition called the Tosafat in which successive generations of Jewish scholars commentate on verses and older commentaries. A page of a Tosafat book is made up of a single verse of the holy texts in a box; on its right is the commentary of an ancient learned Rabbi, and on the left is the Tosafist commentary on the verse and more commentary on the older Rabbi’s commentary. The Tosafat is an exegetical tradition where exegesis means the critical interpretation and explanation of a text.