First, Vitor Oliveira sold the ground floor of the bare-bones brick building he constructed near the top of his sprawling favela in Rio de Janeiro. Then he sold one of two second-floor apartments.

From the Bronx streets to Bollywood beats, Indian rap has evolved from imitation to innovation. Baba Sehgal injected desi flavor, while Bohemia and Honey Singh brought depth and party vibes. Gully Boy ...