Depending on where you live, your threat is much different from the other person. If you ask a New Yorker today, because of the way the press plays it, he will say terrorism is his biggest fear. But for somebody living on a small island state, then it is climate change, the rise of the sea level, for his whole island may be washed away. If I go to southern Africa, they tell me it is HIV/AIDS and somewhere in Asia it is poverty. This is also why you will find it difficult to find agreements, because if you want someone to be concerned about your threat, then you should be concerned about his.