The Zaldans believe themselves the only sane culture in a galaxy of liars, yet they were happy to join the United Federation of Planets. Many dislike them, but Zaldans play an important role in facilitating Federation trade with the Klingon Empire. (ST novel: A Singular Destiny). Zaldans consider even the slightest falsehood unacceptable. Perhaps because of their deeply mandated opposition to deception, there is almost no crime in Zaldan society. The species first achieved warp speeds in 2290. (Last Unicorn RPG module: All Our Yesterdays: The Time Travel Sourcebook)