Brazil and South Africa have dramatically expanded their geopolitical influence over the past two decades. But after years of democratic and economic gains, the two countries now find themselves in the doldrums. One of the reasons for this is that they are addicted to violence. Brazil and South Africa lead their respective continents in murder. This is no easy feat: last year the United Nations reported that 8 of the top 10 most violent countries in the world were... (GunPolicy.org)