What are the 10 most peaceful countries on Earth?

According to the Institute for Economics and Peace, they are Iceland, Denmark, Austria, New Zealand, Portugal, Czech Republic, Switzerland, Canada, Japan and Slovenia. The ranking is based on 23 factors including involvement in conflicts at home and abroad, crime, terrorist activity, political stability, levels of militarization, and relations with other countries in general. Somalia, Afghanistan, Iraq, South Sudan, and Syria are the least peaceful.