"And there will be a Second Foundation of psychohistorians only - mentalists, mind-touching psychohistorians - who will be able to work on psychohistory in a multi-minded way, advancing it far more quickly than individual thinkers ever could. They will serve as a group who will introduce fine adjusments as time goes on, you see. Ever in the backround, watching. They will be the Empire's guardians."
Hari Seldon to Yugo Amaryl[src]

The Second Foundation was an organisation founded by Hari Seldon as a budding colony of mentalics, people with telepathic abilities. Located at Star's End, its purpose was to be hidden from the First Foundation and help insure success in the plan set out by Hari Seldon.

It was revealed at the end of the third book in the original Foundation series that the Second Foundation was located on the planet Trantor, which in comparison to the First Foundation was the true opposite end of the Galaxy, from a perspective of social science rather than physical science. They were governed by a council of the strongest telepaths, called the Speakers. The leader of the group is the First Speaker.

Known Members of the Second Foundation[]