Translation of "Rehará" in English

Sin duda, cada generación se cree destinada a rehacer el mundo. Sin embargo, la mía sabe que no lo rehará. Pero su papel es quizá mayor; éste consiste en impedir que el mundo se deshaga.

Without a doubt, every generation feels like they're destined to rebuild the world. Nevertheless, mine knows that it won't rebuild it. But its role is probably greater; it involves preventing the world from destroying itself.