translation.en: These two facts -- the decline in armed conflict and the decline in murder -- are amongst the most extraordinary, if unheralded, accomplishments of human history, and we should be really excited, right?
translation.zh: 武装冲突减少了， 谋杀犯罪减少了， 这是最为了不起的事实， 若是旷古未有，亦是人类历史的成就， 我们应该为此感到兴奋，对吧？