joining me to discuss his complex legacy is the renowned historian niall ferguson. 's a senior fellow at stanford, university. he spent two decades researching the stateman's life and his b biography spanned a thousand pages an that is just volume one. welcome, niall. let me ask you, you've seen social media and some of the articles, and there is an enormous amount of animosity and hostility surrounding kissinger. and often very personal, personally calling him a war criminal. i wanted to ask you, what is your reaction to kind of charge? >> well, my reaction to much of it is revulsion, frankly. bonham is a good rule but it hasn't held back the haters. henry kissinger never expected to win a pop you'llir ate -- popularity rate. it was bound to be unpopular. so i don't think it would be surprising him. it is frustrating because it misses some very fundamental and important points about the nature of foreign policy, for example that the most choices are between evils and you just have to try to choose the lesser evil. >> so give me, let's talk specifics. take the bombin