was introduced, but often used simply as an alternative to suspended sentences, and the probation officers appointed had little training, and their caseloads numbered several hundred making assistance or surveillance practically impossible. At the same time they could revoke the probation status without going through another trial or other proper process. In 1913, Thomas Mott Osborne became chairman of a commission for the reform of the New York prison system and introduced a Mutual Welfare League at Auburn with a committee of 49 prisoners appointed by secret ballot from the 1400 inmates. He also removed the striped dress uniform at Sing Sing and introduced recreation and movies. Progressive reform resulted in the "Big House" by the late twenties – prisons averaging 2,500 men with professional management designed to eliminate the abusive forms of corporal punishment and prison labor prevailing at the time. The American prison system was shaken by a series of riots in the early 1950s triggered by deficiencies of prison facilities, lack of hygiene or medical care, poor food quality, and guard brutality. In the next decade all these demands were recognized as rights by the courts. In 1954, the American Prison Association changed its name to the American Correctional Association and the rehabilitative emphasis was formalized in the 1955 United Nations Standard Minimum Rules for the Treatment of Prisoners. Since the 1960s the prison population in the US has risen steadily, even during periods where the crime rate has fallen. This is partly due to profound changes in sentencing practices due to a denunciation of lenient policies in the late sixties and early seventies and assertions that rehabilitative purposes do not work. As a consequence sentencing commissions started to establish minimum as well as maximum sentencing guidelines, which have reduced the discretion of parole authorities and also reduced parole supervision of released prisoners. Another factor that contributed to the increase of incarcerations was the Reagan administration's "War On Drugs" in the 1980s. This War increased money spent on lowering the number of illegal drugs in the United States. As a result, drug arrests increased and prisons became increasingly more crowded. The rising prison population was made up disproportionately of African American with 90% of those sentenced to prison for drug offense in Illinois in 2002. By 2010, the United States had more prisoners than any other country and a greater percentage of its population was in prison