According to the Global Peace Index (GPI), Iceland has been the most peaceful country in the world for three years running. (Hmmn, is it any coincidence that they're the only country of note to oust the central banks?)
These findings our based upon indicators such as:
Ongoing Domestic and International Conflict
- Number of external and internal conflicts fought
- Number of deaths from organised conflict (external)
- Number of deaths from organised conflict (internal)
- Level of organised conflict
- Relations with neighbouring countries
Societal Safety and Security
- Level of perceived criminality in society
- Number of refugees and displaced people as a percentage of the total population
- Political instability
- Political Terror Scale
- Terrorist activity
- Number of homicides per 100,000 people
- Level of violent crime
- Likelihood of violent demonstrations
- Number of jailed population per 100,000 people
- Number of internal security officers and police per 100,000 people
Militarisation
- Military expenditure as a percentage of GDP
- Number of armed-service personnel per 100,000 people
- Volume of transfers of major conventional weapons as recipients (import) per 100,000 people
- Volume of transfers of major conventional weapons as supplier (export) per 100,000 people
- Financial contribution to UN peacekeeping missions
- Nuclear and heavy weapons capability
- Ease of access to small arms and light weapons
Although these findings give us a rough idea of a country's "peace quotient" one has to wonder at some of the figures. For example, Canada ranks 8 even though it has obliterated its own indigenous people. Likewise, Australia ranks 16 even though they have been actively committing genocide for decades against the native Australians (aka Aboriginals), the oldest indigenous people in the world.
Paradoxically, Indonesia, the country that mercilessly slaughtered their neighbors -- the indigenous East Timorese -- ranks 54, but Papua New Guinea (formerly Timor) rates a paltry 99. Incidentally, that's the same rating the GPI gives the United States -- What?!
Dig around the Middle East and you'll find some other anomalies.
To see how other countries rate, use this interactive map: http://www.visionofhumanity.org/#page/indexes/global-peace-index/2013
Countries ranked 1st have a lower score and are the most peaceful.
#CountryScore 1 
Iceland 1.1622 
Denmark 1.2073 
New Zealand 1.2374 
Austria 1.2505 
Switzerland 1.2726 
Japan 1.2937 
Finland 1.2978 
Canada 1.3069 
Sweden 1.31910 
Belgium1.33911 
Norway 1.35912 
Ireland 1.37013 
Slovenia 1.37414 
Czech Republic 1.40415 
Germany 1.43116 
Australia 1.43816 
Singapore 1.43818 
Portugal 1.46719 
Qatar 1.48020 
Bhutan 1.487