Powerful words of Lord Shri Krishna.. I have an unrelated question just in general about God and our beliefs.. so there is a shlok from Bhagvad Gita, "यदा यदा हि धर्मस्य.." which means God will take avatar whenever there is injustice and unrighteousness increases, he will reincarnate as a human and destroy all evil. But do you think isn't the present world and even from past 100 years or so, there have been innumerous massacres in the form of world wars, holocaust, many races have suffered genocide, why hasn't god intervened?