http://www.aclu.org/blog/prisoners-rights-human-rights/aclu-testify-today-solitary-confinement-human-rights-violation please, read whole article there, here only some lines:
With 80.000 prisoners in Solitary Confinement the US holds more people in segregation than other countries have in their entire prison systems
ACLU to Testify Today: Solitary Confinement is a Human Rights Violation Happening on U.S. Soil
By Hilary Krase, ACLU National Prison Project at 10:01am
The world will get a glimpse this week into how the United States treats those we lock in solitary confinement, when the Inter-American Commission on Human Rights hears ACLU testimonies on how our treatment of vulnerable prisoners violates international human rights norms. The short story: we should be ashamed. For a more detailed picture, check back throughout the week for an ongoing blog series on the issue.
Both domestically and abroad, there is an increasing recognition of the negative effects of prolonged solitary confinement – yet this harmful practice still occurs in our own backyard. … Read more