The Mind Control Revolts (or Mind Control Riots) were conflicts, taking place between 2043 and 2047, on Earth. (Star Trek: The Motion Picture novelization, TOS novel: Strangers from the Sky, Star Trek: Avenger: "The Essential Process") These were violent demonstrations against computer-implants in brains; some nations were using medical implants (such as those to correct vision impairments) to control more radical members of their populations. (Orion Press: "Lexicon, M-O" [2010 revision])