The definition of a developed country is "a sovereign state that has a highly developed economy and advanced technological infrastructure relative to other less industrialized nations."
Developing nation............. a nation where the average income is much lower than industrial nations where the economy relies on a few exports crops and where farming is conducted by primitive methods in many developing nations rapid population growth threatens the supply of food
Gadsden's Purchase provided the land necessary for a southern transcontinental railroad and attempted to resolve conflicts that lingered after the Mexican-American War .
