Lord Krishna said: I (the Supreme) am the mighty Time, destroyer of the world, engaged here to annihilate all beings. Even without you (if you are not there to fight), all the warriors arrayed in the rival armies will not survive.
Krishna, the Supreme, climaxes the Viśva-rūpa scene. Inexorable Time causes creation, prevalence and destruction alike. All the four are part of a whole. When misrule and corruption become rampant, not to subdue it is wrong. Existence and expression warrant it. Any laxity will be a violation of nature. Kurukshetra war is not precipitated due to an Arjuna or a Duryodhana. A multitude of warriors welcome it. Each wants to give his best and is ready to receive the worst.