On Purim and all the days of Hanukkah, a curious piece of liturgy is added to both the blessing after meals and the thrice-daily silent prayer. The two festivals have in common that each is of entirely rabbinic invention and celebrates a miraculous deliverance from Gentile monarchy. There is a specific version for Hanukkah and a parallel one for Purim, but the two share the same opening lines, the first two words of which, al ha-nissim, give the prayer its name (I’ve used the Sephardi version here, but the wording in the Ashkenazi liturgy is nearly identical):
The Anxieties of Purim
The book of Esther and the festival of Purim mark the beginnings of the exilic world, in which the battle to remain Jewish never really goes away.