The Yuga cycle
The bull of Dharma - Has four legs in satya/krita yuga, three legs in treta yuga, two legs in dvapara yuga and only one leg in kali yuga,Morality is reduced to quarter of satya yuga
Satya/Krita yuga or the Age of perfection and truth- (4000 divine years)
Derived from the Sanskrit word "satya" means truth. During satya yuga people were righteous, religious performed penance and devoid of wickedness, jealous, falsehood people lived happily and dharma prospered everywhere.
Incarnation of lord Vishnu : Matsya, Kurma, Varaha and Narasimha.
Treta yuga - (3000 divine years) In the Treta age people are devoted to ritual performances and severe austerities. They are not excessively violent or very lusty after sensual pleasure. Their interest lies primarily in religiosity, economic development and regulated sense gratification, and they achieve prosperity by following the prescriptions of the three Vedas. Although in this age society evolves into four separate classes, O King, most people arebrahmanas:Srimad bhagavatam12.3.21
Incarnation of lord Vishnu: Vamana,Parashuram and Rama.
Dvapara yuga - (2000 divine years) In the Dvapara age people are interested in glory and are very noble. They devote themselves to the study of the Vedas, possess great opulence, support large families and enjoy life with vigor. Of the four classes, the ksatriyas and brahmanas are most numerous : Srimad bhagavatam 12.3.23
Incarnation of lord Vishnu : lord Krishna and balarama. Dvapara yuga ended with lord Krishna returning to his eternal abode. The famous Mahabharata war took place in this era.
Kali Yuga - (1000 divine years) Because of the bad qualities of the age of Kali, human beings will become shortsighted, unfortunate, gluttonous, lustful and poverty-stricken. The women, becoming unchaste, will freely wander from one man to the next.Cities will be dominated by thieves, the Vedas will be contaminated by speculative interpretations of atheists, political leaders will virtually consume the citizens, and the so-called priests and intellectuals will be devotees of their bellies and genitals.
When there is a predominance of cheating, lying, sloth, sleepiness, violence, depression, lamentation, bewilderment, fear and poverty, that age is Kali, the age of the mode of ignorance ( Source : Srimad Bhagavatam)
Incarnation of lord Vishnu : Lord kalki avatar with a sword destroying the wicked riding in his horse named Devadatta will bring forth satya yuga.
