The last of the four ages, or yugas, in Hindu cosmology; called the age of conflicts or the dark age in which strife, discord, and moral deterioration are prevalent.
The four yugas are Satya or Krita, Tretā, Dvāpara, and Kali; the first age begins in perfection and each succeeding one decreases in length and increases in its degradations.
The Hindu scriptures describe the Kali Yuga (the age through which we are presently passing) as characterized by greed, lust, deception, fatal disease and continuous hunger, revolution, war, disrespect for scripture and true sages, and the practice of ritualistic religion rather than true spirituality.
Every Kali Yuga, according to some calculations, lasts 432,000 years and then ends in destruction, after which the entire cycle of the four yugas begins again.
Mark L. Prophet and Elizabeth Clare Prophet, Lost Teachings of Jesus: Missing Texts • Karma and Reincarnation.