The Kali Yuga
source: The Life of Milarepa, Lhalungpa edition
    The Kali Yuga (the Dark Age) refers to the fourth and last cycle of time of our universe. The first three were known as the Satya Yuga (complete happiness), Treta Yuga (threefold happiness), and Dwapara Yuga (twofold happiness). The Kali Yuga era is marked by (1) intellectual sophistication at the expense of spiritual attainment, (2) decline in the quality of life, (3) increasing menace to an already shortened life-span, (4) misguided concepts and mental impurity, and (5) widespread violence and conflicts.