<P> The Least Developed Countries (LDCs) is a list of developing countries that, according to the United Nations, exhibit the lowest indicators of socioeconomic development, with the lowest Human Development Index ratings of all countries in the world . The concept of LDCs originated in the late 1960s and the first group of LDCs was listed by the UN in its resolution 2768 (XXVI) of 18 November 1971 . </P> <P> A country is classified among the Least Developed Countries if it meets three criteria: </P> <Ul> <Li> Poverty--adjustable criterion based on GNI per capita averaged over three years . As of 2018 a country must have GNI per capita less than US $1,025 to be included on the list, and over $1,230 to graduate from it . </Li> <Li> Human resource weakness (based on indicators of nutrition, health, education and adult literacy). </Li> <Li> Economic vulnerability (based on instability of agricultural production, instability of exports of goods and services, economic importance of non-traditional activities, merchandise export concentration, handicap of economic smallness, and the percentage of population displaced by natural disasters). </Li> </Ul> <Li> Poverty--adjustable criterion based on GNI per capita averaged over three years . As of 2018 a country must have GNI per capita less than US $1,025 to be included on the list, and over $1,230 to graduate from it . </Li>

What is the most underdeveloped region in the world