So is Mexico ranked the most dangerous country in the world? No.
But first, I want to point out that the official ranking goes the other way, with number one being the safest country in the world, and the last country on the list being the most dangerous. So if Mexico was rated “number one,” that would mean it was the safest country in the world (which it’s not, but neither is the U.S.).
The 2018 rankings weren’t out at the time of Trump’s tweet, but according to the Global Peace Index Ranking for 2017, Iceland was the safest country in the world at #1 and Syria was the most dangerous country at #163. Mexico was ranked #140, and the United States was ranked #121. The 2018 rankings released in June 2018 showed no changes for Mexico or the United States (or for Iceland and Syria).
Dr. Michelle Martin is a social worker, policy specialist and Assistant Professor at California State University, Fullerton in the Department of Social Work, where she teaches social welfare policy, and researches dynamics related to immigrants, political asylum-seekers, refugees and other displaced populations.