During the 1955-56 academic year, the Professors of Philosophy at Harvard were Henry D. Aiken, Raphael Demos, W.V.O. Quine, Morton White, John Wild, and Donald Williams. There was one associate professor: Roderick Firth. The junior faculty were Hiram McClendon, Hao Wang and Paul Ziff.
At Princeton, in the same year, the full professors were Carl Hempel, Gregory Vlastos, and Ledger Wood. The associate professors were Walter Kaufmann, James Ward Smith, and Arthur Szathmary. The junior faculty were Hilary Putnam, Bernard Wand, and John Yolton.
It is an interesting question whether the academic philosophical world of sixty years from now will look more or less discontinuous. I bet on more continuous, since the professionalization of academia has become more firmly entrenched since 1955.