In international relations, aid (also known as international aid, overseas aid, or foreign aid) is a voluntary transfer of resources from one country to another, given at least partly with the objective of benefiting the recipient country. It may have other functions as well: it may be given as a signal of diplomatic approval, or to strengthen a military ally, to reward a government for behaviour desired by the donor, to extend the donor's cultural influence, to provide infrastructure needed by the donor for resource extraction from the recipient country, or to gain other kinds of commercial access.Humanitarianism and altruism are, nevertheless, significant motivations for the giving of aid.

Aid may be given by individuals, private organisations, or governments. Standards delimiting exactly the kinds of transfers that count as aid vary. For example, aid figures may or may not include transfers for military use: to cite one instance, the United States included military assistance in its aid figure until 1957 but no longer does. The most widely used measure of aid, "Official Development Assistance" (ODA) is such a figure. It is compiled by the Development Assistance Committee of the Organisation for Economic Co-operation and Development. The United Nations, the World Bank, and many scholars use the DAC's ODA figure as their main aid figure because it is easily available and reasonably consistently calculated over time and between countries. The DAC consists of 22 of the wealthiest Western industrialised countries plus the EU; it is a forum in which they coordinate their aid policies.

Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells in an effort to produce energy, maintain life, or stimulate growth.

Historically, people secured food through two methods: hunting and gathering, and agriculture. Today, most of the food energy consumed by the world population is supplied by the food industry.

Food safety and food security are monitored by agencies like the International Association for Food Protection, World Resources Institute, World Food Programme, Food and Agriculture Organization, and International Food Information Council. They address issues such as sustainability, biological diversity, climate change, nutritional economics, population growth, water supply, and access to food.

The right to food is a human right derived from the International Covenant on Economic, Social and Cultural Rights (ICESCR), recognizing the "right to an adequate standard of living, including adequate food", as well as the "fundamental right to be free from hunger".