Comprehensive poverty falls on the world, and dominates it very quickly, but between nearly fifty countries, we have failed to fail. These billion people live below the poverty line; As the individual lives on them at less than one dollar per day, while the rest of the world is moving forward with a steady and firm pace, these billion people left the forgotten people behind it more or more. To global stability. Why do the poorest countries in the world put obstacles in the face of the international community's attempts to help them? Why does it seem to be no one - whatever - to make a change in the existing conditions? In his book, one billion people under the line of poverty, Paul Coleier, the spotlight on corruption issues, political turmoil, and the way to use wealth, which is a fundamental issue that is in the roots of the problem. It reviews other influential factors such as: civil war, relying on exporting natural wealth, and the lack of rational government; This leads to the fall of the country in the trap of social underdevelopment and economic decline. Collier looks carefully and accurately to the reasons that made traditional aid unable to address these problems, and sets an ambitious and new and new action plan that includes a new business schedule for the group of eight countries that adopt more effective criteria, preferential commercial policies, and direct military intervention if necessary. All of these initiatives were carefully designed to help billion people forget below the poverty line. It is a great challenge, but rather it is one of the most important challenges facing the world in the twenty -first century.