The economy of Niger is based largely on internal markets, subsistence agriculture, and the export of raw commodities: foodstuffs to neighbors and raw minerals to world markets. Niger, a landlocked West African nation that straddles the Sahel, has consistently been ranked on the bottom of the Human development index, with a relatively low GDP and per capita income, and ranks among the least developed and most heavily indebted countries in the world, despite having large raw commodities and a relatively stable government and society not currently affected by civil war or terrorism. Economic activity centers on subsistence agriculture, animal husbandry, re-export trade, and export of uranium.