第二基地
However, as a result, the first Foundation has learned something of the Second Foundation beyond the simple fact that it exists, and has some understanding of its role. This means their behavior will now be chosen in light of that knowledge, and not based on uninformed natural human behavior, which means their behavior will no longer be the natural responses required by the mathematics of the Seldon Plan. This places the Plan itself at great risk. In addition, the first Foundation starts to resentfully consider the other as a rival, and a small group secretly begins to develop equipment for detecting and blocking mental influence in order to detect members of the Second Foundation. After many attempts to infer the Second Foundation's whereabouts from the few clues available, the Foundation is led to believe the Second Foundation is located on Terminus (the "opposite end of the galaxy" for a galaxy with a circular shape). The Foundation uncovers and destroys a group of fifty members of the Second Foundation and is left believing they have destroyed the Second Foundation. No longer concerned with the perceived threat, their behavior as a society will tend towards those anticipated by the Plan.