Areas of the world classified as less than developed tend to have a relatively inflexible economic system dominated by an agricultural sector with low levels of productivity, a rudimentary industrial sector plagued by inefficient methods of production utilizing antiquated technologies, a semi-literate population with little chance of bettering itself because of sheer numbers and a rigid social system, a high level of unemployment or underemployment, and a limited infrastructure. All of these characteristics contribute to low real per capita income, difficulties in finding export markets, and an environment of economic stagnation. Modernization, which includes both economic development and social mobilization, is difficult to achieve.