After the Socialist Party imploded in 1972 Glotzer joined the Social Democrats, USA, the group closest to Shachtman's ideas, and remained a member for the rest of his life.
After the Socialist Party shattered in 1972-73 Glotzer joined the Social Democrats, USA, the group closest to Shachtman's ideas. He remained a member of this organization and its governing National Committee for the rest of his life.