Peace doesn't mean much if it's enforced by the collective to silence the individual through the threat of violence.
Let's not forget that Saddam Hussein and Gaddafi led their Nations with greater "peace" than their successors.
I wanted to play around with multidimensional data about global trends like these for a while now, but looking up all that data can be a drag, if possible at all.
Of course those are still just single numbers aggregated from many different factors. However, the sources for those factors are named and are in many cases available online (although sometimes paywalled, or offering no convenient download functionality).
Uppsala Conflict Data Program https://ucdp.uu.se/downloads/
IISS Armed Conflict Database (paywalled) https://www.iiss.org/publications/armed-conflict-database/
UNHCR Refugee Population Statistics https://data.humdata.org/dataset/unhcr-refugee-pop-stats
Global Internal Displacement Database http://www.internal-displacement.org/database
UNODC Crime Statistics https://dataunodc.un.org/crime
The Economist Intelligence Unit (paywalled) https://data.eiu.com/
World Prison Brief http://prisonstudies.org/highest-to-lowest/prison-population...
Stockholm International Peace Institute https://sipri.org/databases
United Nations Register of Conventional Arms https://www.unroca.org/
We rank order countries by a single aggregate metric all the time. It seems clear that one number is going to tell you very little about a given country's individual cities.
It's interesting that these countries repeatedly show up in lists together, like GPI. I think it has to do with my own biases + liberalism + development + peacefulness.
Another, half-joking way of looking at it would be ‘countries that do not present a significant immigration towards the US’