According to the eight-year-old research of the Institute for Economics and Peace that ranks the global peace and violence in the world, the Global Peace Index Report shows that Syria is the world's most dangerous country as of 2015. "The Global Peace Index measures the state of peace in 162 countries according to 23 indicators that gauge the absence of violence or the fear of violence. It is produced annually by the Institute for Economics and Peace," according to the Vision of Humanity site.
"2014 was marked by contradictory trends: on the one hand many countries in the OECD achieved historically high levels of peace, while on the other, strife-torn nations, especially in the Middle East, became more violent. This is a real concern as these conflict become even more intractable they spread terrorism to other states," according to Steve Killelea, founder and executive chairman of the Institute for Economics and Peace.
Watch the 2015 Global Peace Index showing the overall change in peace of the 162 countries for eight years: