The term eventually stuck. The Rocinha favela near Ipanema Beach in Rio de Janeiro, Brazil, on Aug. 3, 2016. DEAN LEWINS / EPA 2. Favelas grew because of migration into the city.

But less than 1% of the favela’s population is involved in violence. When you’re inside, you feel the other 99%: peace-loving, hardworking people.

On Sunday, rabid fans filled Rio’s de Janeiro’s Maracanã Stadium for Argentina’s World Cup clash against Bosnia-Herzegovina. The match was also a showcase for the $500 million, three-year ...

The mayhem in the favela of nearly 200,000 people reflects a national plague. Brazil suffered a record 61,000 violent deaths in 2016, a figure greater than the estimated loss of life that year in ...