During the 30-35 years of the rapid prison population expansion, private prisons represented an even smaller portion of the US prison population, closer to 2-3% averaged. Their expansion in market share has occurred at a time when the US prison population has been shrinking, but that's a wildly inconvenient fact.

It was government prisons nearly all of those people were put into during the prime years of the massive drug war, not private prisons. Commenters always and without exception intentionally ignore that fact, for obvious reasons (implodes the propaganda). I'm entirely against private prisons, however it's comical the lengths people will go to, to pretend it wasn't government prisons those millions of people were put into. The prison boom was a government prison boom. The prison industrial complex was a government effort almost exclusively. The drug war was a government effort. The cops (government) benefitted, the police unions benefitted, the government contractors benefitted, the politicians benefitted (jobs and construction in their districts, along with more tax money and government spending).

>Their expansion in market share has occurred at a time when the US prison population has been shrinking, but that's a wildly inconvenient fact.

Are you making the claim that private prisons reduce total inmates? If not, this claim, truth or not, is irrelevant.