The Global Peace Index (GPI) is a measure that ranks countries based on their levels of peace. It evaluates various factors, including levels of violence, conflict, and incarceration rates, to provide a comprehensive view of how peaceful a nation is. The GPI is published annually by the Institute for Economics and Peace and is widely used by policymakers and researchers. The GPI uses a scale from 1 to 5, where lower scores indicate higher levels of peace. Countries are assessed on indicators such as military expenditure, political stability, and relations with neighboring countries. This index helps to highlight trends in global peace and security.