argues that "the primary objective of the program was geopolitical: to provide food for the populace in undeveloped countries and so bring social stability and weaken the fomenting of communist insurgency." Citing internal Foundation documents, Dowie states that the Ford Foundation had a greater concern than Rockefeller in this area. Socioeconomic impacts The transition from traditional agriculture (in which inputs were generated on-farm) to Green Revolution agriculture (which required the purchase of inputs) led to the widespread establishment of rural credit institutions. Smaller farmers often went into debt, which in many cases resulted in a loss of their farmland. The increased level of mechanization on larger farms made possible by the Green Revolution removed a large source of employment from the rural economy. The new economic difficulties of smallholder farmers and landless farm workers led to increased rural-urban migration. The increase in food production led to cheaper food for urban dwellers. According to a 2021 study, the Green Revolution substantially increased income. A delay in the Green Revolution by ten years would have cost 17% of GDP per capita, whereas if the Green Revolution had never happened, it could have reduced GDP per capita in the developing world by half. Environmental impact Biodiversity The spread of Green Revolution agriculture affected both agricultural biodiversity (or agrodiversity) and wild biodiversity. There is little disagreement that the Green Revolution acted to reduce agricultural biodiversity, as it relied on just a few high-yield varieties of each crop. This has led to concerns about the susceptibility of a food supply to pathogens that cannot be controlled by agrochemicals, as well as the permanent loss of many valuable genetic traits bred into traditional varieties over thousands of years. To address these concerns, massive seed banks such as Consultative Group on International Agricultural Research’s (CGIAR) International Plant Genetic Resources Institute (now Bioversity International) have been established (see Svalbard Global Seed Vault). There are varying opinions about the effect of the Green Revolution on wild biodiversity. One hypothesis speculates that by increasing production per unit of land area, agriculture will not need to expand into new, uncultivated areas to feed a growing human population. However, land degradation and soil nutrients depletion have forced farmers to clear forested areas in order to maintain production. A counter-hypothesis speculates that biodiversity was sacrificed because traditional systems of agriculture that were displaced sometimes incorporated practices to preserve wild biodiversity, and because the