A neighbor of mine in Sao Paulo built a house that reminds me of a South American dictator’s compound. He may have spent his entire allotment of $12 million on the house. But now his problem is Leonardo, who points out that a human cannot possibly feel at ease in such a disproportionate house. Certainly my neighbor can live there, open it to photographers from design magazines, and be admired from afar. But in winter he’ll huddle in the tiny TV room on the second floor, withdrawing from the cavernous rooms to seek a more human scale.