The Vulcan Isolationist Movement was a small 24th century faction of extreme isolationists who believed contact with alien worlds was polluting their culture and destroying Vulcan purity. This faction advocated for the complete isolation of Vulcan from the galaxy and the eradication of all alien influence on the planet. This faction formed several years prior to 2370.
In 2369, the Vulcan Isolationist Movement stole the first fragment of the Stone of Gol, an ancient weapon which focused and amplified telepathic energy, from a heavily-guarded museum and hired mercenaries to find the two remaining pieces in the quadrant. In 2370, Tallera, a member of these extremists, acquired all three pieces; however, her plans were foiled by Captain Jean-Luc Picard. After Minister Satok, the head of the V'Shar, placed her in custody, his agency began a search for the other members of the faction. (TNG: "Gambit, Part I", "Gambit, Part II")