How little - yet how much - has changed in the last 40 years. The COINTELPRO papers sound distinctly 21st century as they detail the monitoring of perceived threats to "national security" by the FBI, CIA, National Security Agency (NSA), Secret Service, and the military, as well as the intelligence bureaucracy's war on First Amendment protest activity.
The Church Committee investigation concluded in 1976 that the "unexpressed major premise of the programs was that a law enforcement agency has the duty to do whatever is necessary to combat perceived threats to the existing social and political order."
In addition to massive surveillance, assassinations and dirty tricks "by any means necessary" included the creation of NSA "watch lists" of Americans ranging "from members of radical political groups, to celebrities, to ordinary citizens involved in protests against their government," with names submitted by the FBI, Secret Service, military, CIA, and Defense Intelligence Agency. The secret lists, which included people whose activities "may result in civil disturbances or otherwise subvert the national security of the US," were used by the NSA to extract information of "intelligence value" from its stream of intercepted communications.
We learned that there was, apparently, no easy way to get off the FBI's "security index." Even after the criteria for fitting the profile of a "subversive" were revised in the mid-1950's, the names of people who no longer fit the definition remained on IBM punchcards, and were retained in field offices as "potential threats." A card would only be destroyed "if the subject agreed to become an FBI source or informant" or in another way indicated a "complete defection from subversive groups."