Hungry people will do anything for food, which means that those who have control over food can use it as leverage.
In 1974, Henry Kissinger suggested using food as a weapon to induce targeted population reduction in a previously classified 200-page report, National Security Study Memorandum 200: Implications of Worldwide Population Growth for U.S. Security and Overseas Interests.
The primary tactic to be applied is that food aid would be withheld from developing nations until they submitted to birth control policies:
There is also some established precedent for taking account of family planning performance in appraisal of assistance requirements by AID [U.S. Agency for International Development] and consultative groups.
Since population growth is a major determinant of increases in food demand, allocation of scarce PL 480 resources should take account of what steps a country is taking in population control as well as food production. In these sensitive relations, however, it is important in style as well as substance to avoid the appearance of coercion.