. >> now on booktv historian margaret macmillan, author of the book "war: how conflict shaped us." this conversation was hosted by the new york historical society. >> good evening, everyone. i am louise mirrer, new york a. >> societies president and ceo and i am thrilled to welcome you to the knights virtual program, "war: how conflict shaped us." to knights presentation is presented as a part of our menard's and irene schwartz distinguished speaker series which is the heart of our public programs. just before i introduce our speakers i want to recognize and thank several new york historical trustees were joining us this evening. the chair of the board, visioneer chairman emeritus of new york historical roger her dog, the chair of our executive committee richard reese, and trustees brian kane, suzanne, david. i would also like to thank members of our chairman skelton who were joining us this evening. we are so very grateful to each and every one of you for your encouragement and support especially at this challenging time. now then, we are very pleased indeed to welcome martha mcmi