Islam Karimov, Uzbekistan. Age 67. In power since 1990. Last year’s rank: 15
Until 2005, the worst excesses of Karimov’s regime had taken place in the torture rooms of his prisons. But on May 13, he ordered a mass killing that could not be concealed. In the city of Andijan, 23 businessmen, held in prison and awaiting a verdict, were freed by their supporters, who then held an open meeting in the town square. An estimated 10,000 people gathered, expecting government officials to come and listen to their grievances. Instead, Karimov sent the army, which massacred hundreds of men, women and children. A 2003 law made Karimov and all members of his family immune from prosecution forever.