To explain briefly, the safety score for countries equally weighs each of the three factors: war and peace, personal security, and natural disaster risk. The safety score aggregates the indices from these three risks, thus presenting a comprehensive view of safety for each country. This also means that a high level of risk in one factor will have limited effect on the country’s overall ranking. For example, the Philippines is ranked least safe while Yemen is ranked second least safe. This can be attributed to the fact that the Philippines has poor scores in peace, security, and prevalence of natural disasters. Yemen's terrible score is due to war and famine but the country has a very low risk of natural disaster. Thus, the Philippines ranks lower than Yemen even though Yemen is a warzone.