once krishna said

The idea of yuga has  multiple meanings first one is this When the king properly abides by the penal code following it to the letter, then that best of periods called the Krita Yuga sets in. Let this doubt not rise in your mind viz. whether the yuga is the cause of the king or the king the cause of the Yuga — know this for certain that the king is the cause of the Yuga. It is the king that creates the Krita, Treta or the Dvapara Yugas. Indeed it is the king that also causes the fourth yuga (Kali). The king that causes the Krita Yuga to set in enjoys heaven exceedingly. The king that causes the Treta Yuga to set in enjoys heaven but not exceedingly. For thus causing the Dvapara Yuga to set in a king enjoys heaven according to his due. The king however that causes the Kali Yuga to set in earns sin exceedingly. Thereupon that king of wicked deeds resides in hell for countless years. Udyoga Parva section cxxxii (132) 2nd one is the The end of the yuga cycle I. E the...