How do we prevent war? How do we maintain peace? These questions have been posed by nations and people throughout history. Concessions often bring about peace in the short term, defusing tensions for a while, but the aggressor's initial demands are not forgotten and, in fact, often bolstered with time. The lessons of appeasement verses deterrence are hard-learned time and time again. The Price of Peace: A Personal Exploration by Johan Norberg examines the use of deterrence of enemy aggression in the past, and the efforts to sustain it in the current era of rogue nations and nuclear proliferation.