A term used by Andrew Jackson Davis to signify wicked, ignorant, or undeveloped spirits. Davis believed that at death no sudden or violent change takes place in the character and dis-position of an individual. Those who were mischievous, unprincipled, or lascivious during their lives remained so, for a time at least, after they died. The American Spiritualist Hudson Tuttle stated, "As the spirit enters the spirit world just as it leaves this, there must be an innumerable host of low, undeveloped, uneducated, or in other words, evil spirits." Davis believed there was a special sphere or plane for these diakka where they were put on probation. He said they were responsible for the fraud and trickery often witnessed at séances; they not only deceived the sitters, but the medium as well. Davis believed the way to avoid their influence is to live a pure, refined, and religious life, for these evil spirits are naturally attracted to those whose minds most resemble their own.
——. The Harmonial Philosophy: A Compendium and Digest of the Works of Andrew Jackson Davis. London: Rider, 1917.