The wonderful writer Luis Alberto Urrea says that a deep truth of our time is that “we miss each other.” He is singularly wise about the deep meaning and the problem of borders. The Mexican-American border, as he likes to say, ran straight through his parents’ Mexican-American marriage and divorce. His works of fiction and non-fiction confuse every dehumanizing caricature of Mexicans — and of U.S. border guards. The possibility of our time, as he lives and witnesses with his writing, is to evolve the old melting pot to the 21st-century richness of “us” — with all the mess and necessary humor required.