Jarok was a male Vulcan who lived during the ancient times on his Vulcan when it was rife with warfare and violent emotions. He was known to had been one of two prized students of the philosopher T'Plana-Hath alongside a young Surak. Later, when Surak concluded that his people needed to change their ways - he debated the concept of complete pacifism by embracing logic in a path that later became known as Tu-Surak. Amongst his circle of colleagues was Jarok, Nirak and T'mor who all heard Surak's words.