You might find The Manufacture of Madness: A Comparative Study of the Inquisition and the Mental Health Movement by Dr. Thomas Szasz interesting.
In this book Dr. Szasz historically shows the startling revelation of how modern psychiatry evolved out of and is the modern day equivalent of the Inquisition. As the church lost its control over the state during the Enlightenment, witches were relabeled as crazies and the role of social control was taken over by the psychiatric state.
And in many of those contexts those determinations are routinely unjustified, and have resulted in massive institutionalized civil rights violations over generations. You can read Thomas Szasz for heartbreaking details (e.g. http://www.amazon.com/Manufacture-Madness-Comparative-Inquis...). Hopefully someday we can look back on such policies with similar horror to how we now see 17th century Bedlam. Instead of using them as arguments for further authoritarianism.