Agrarianism is a political and social philosophy that has promoted subsistence agriculture, smallholdings, and egalitarianism, with agrarian political parties normally supporting the rights and sustainability of small farmers and poor peasants against the wealthy in society. In highly developed and industrial nations or regions, it can denote use of financial and social incentives for self-sustainability, more community involvement in food production (such as allotment gardens) and smart growth that avoids urban sprawl, and also what many of its advocates contend are risks of human overpopulation; when overpopulation occurs, the available resources become too limited for the entire population to survive comfortably or at all in the long term.