In the five days I spent with Greenwald, he revealed himself to be buoyant, chummy, emotional, and a total charmer. It also became clear that the greatest engine driving his work is not a dogged commitment to abstract ideals but the tender relationships he builds with the few who are very close to him, be it Miranda, Snowden, a disembodied screen name on an Internet message board, or the flock of half-blind sclerotic mutts he shepherds.