They were divided into two rivaling nation-states known as the Kes and the Prytt Alliance. Due to the long conflict between the two nations, both states have developed a strong sense of paranoia and xenophobia. There were virtually no inter-governmental communications, not even in an emergency capacity, since the late 23rd century.
In 2370, the bigger part of this species (the Kes) applied for associate membership in the United Federation of Planets, but after the crew spent some time with a Kes ambassador trying to rescue captured crewmembers from the Prytt, this request was ultimately denied after the Kes demonstrated their extreme paranoia, to the point that the 'ambassador' insisted that only his own quarters were secure enough for him to discuss matters with Commander Riker. (TNG: "Attached")