Sarek of Vulcan spent most of his life in service of the Vulcan people, as an ambassador and representative on the Federation Council. He was also well known as the father of noted Starfleet officer (and fellow diplomat) Spock and the former husband of the Earth woman Amanda Grayson.
Sarek's accomplishments as an ambassador of the Federation included the Coridan admission debate of 2268 before the Federation Council, early treaties with the Klingon Empire (Treaty of Alliance) as well as with Alpha Cygnus IX, and his incredible effort to bring about a Federation-Legaran treaty, which began in 2273, and concluded in 2367. Though he briefly retired shortly before the Babel Conference in 2268, Sarek's involvement in the Coridan admission debate included attending multiple council sessions, at least one of which was before the conference on Babel.
In 2368, Sarek died at the age of 203, in his home on Vulcan. When meeting with Ambassador Spock on Romulus, Picard learned that Spock and his father had never mind-melded, and offered Spock the chance to share what Sarek had shared with him. The meld passed along Sarek's true feelings of love and admiration for his son that he had never allowed himself to convey in life.