In marking the 50th anniversarty of Vatican II and Nostra Aetate, we may be tempted to adapt a simple "then and now" perspective. Much has happened in the intervening years. This lecture examines four generations: those mature in the 1960s; those who came of age in the decade after Council; those growing up thereafter, many of whom left the institution or chose traditional Catholicism; and today's generation, who are spiritual searchers with myriad religious possibilities. Depending on our generation, the promises of Nostra Aetate may seem hopeful, dangerous, timid or quaint.