Here is a news story from China Daily about slaves, in China, in the year 2007 http://www.chinadaily.com.cn/china/2007-06/16/content_895699.htm

Parenti and his acolytes like Randal Jones, have tried to suggest for decades that the social and economic inequalities in Pre-1950 Tibet-- which the Dalai Lama had no control over since he was in his minority-- were an excuse for China to invade Tibet. Yes, there were many poor people in Tibet before 1950--and there are many poor people there today. Yes, wooden and metal shackles were used to punish criminals in Tibet pre 1949--and Tibetans are tortured by China today. Jones' motive with his comments is to bring up the old canard that "The Tibetans were all slaves, and China liberated them." Its hogwash. Tibetans, Americans, and Chinese, need to resolve their own social ills-- without foreign invasion to 'help' them.

If it were acceptable for China to invade Tibet, to 'help' the Tibetans then China should have invaded Mississippi in the 1950's because of the inequalities there? Or if this is true then the US should invade China, today, because slavery is still allowed there?