In the absence of justice, error and evil thrive. Truly, evil only gets worse when those who are righteous resort to revenge and do not insist upon justice. The Ahimsa of Kautilya was based on the idea of Dharma. Ahimsa doesn’t mean you will never hurt anyone – it means you won’t hurt anyone unless they attack you first. It’s a no-first-strike policy. You can resort to retaliation during the war with pre-emptive strikes only if you are sure that the first strike would be brutal or lethal, leaving you no retaliatory capabilities.