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The Green Revolution (1960s–1980s) introduced high-yield seed varieties, chemical fertilizers, and irrigation, vastly raising agricultural productivity in Asia and Latin America. Yields more than doubled, enabling food security and releasing labor. However, benefits concentrated where irrigation was feasible, increasing regional inequality; environmental costs (groundwater depletion, soil degradation) are now apparent.
From your study of agriculture's role in development, you know that most poor countries begin with the majority of their population farming at low productivity, and that raising agricultural output is a precondition for structural transformation — freeing labor and generating surplus to fuel industrialization. The Green Revolution is the single most dramatic episode of agricultural productivity growth in modern history, and understanding it reveals both the transformative power and the distributional complications of technology-driven development.
The technical package was straightforward: high-yield variety (HYV) seeds — particularly dwarf wheat and rice varieties developed by Norman Borlaug and researchers at IRRI — produced dramatically more grain per hectare than traditional varieties, but only when combined with adequate water and chemical fertilizers. The key innovation was breeding shorter, sturdier stalks that could support heavy grain heads without toppling over, and that responded to fertilizer by producing more grain rather than more leaf and stalk. When farmers in Punjab, India adopted HYV wheat with irrigation and fertilizer in the late 1960s, yields roughly tripled within a decade. Similar transformations occurred across irrigated regions of South and Southeast Asia and parts of Latin America.
The aggregate results were extraordinary. India went from chronic food deficit and dependence on American grain shipments to food self-sufficiency by the mid-1970s. Millions of people who would have faced famine survived. But the distributional effects were uneven. The Green Revolution was fundamentally a complementary technology — HYV seeds required reliable irrigation, purchased fertilizer, and access to credit to buy inputs. Farmers in rain-fed regions, which include much of Sub-Saharan Africa and the dryland areas of South Asia, could not adopt the package. Wealthier farmers who could afford irrigation and inputs benefited enormously; poorer farmers in less-favored regions were left behind. This pattern increased regional inequality within countries even as it raised national output.
The environmental consequences, now visible decades later, illustrate the long-run costs of input-intensive agriculture. Groundwater tables in Punjab have dropped dramatically due to decades of intensive irrigation. Excessive fertilizer use has degraded soils and polluted waterways. Monoculture cropping — planting the same HYV rice or wheat year after year — has reduced biodiversity and increased vulnerability to pests and disease. The Green Revolution remains one of the great achievements of development, but it also serves as a case study in the tradeoffs between rapid productivity gains and long-term sustainability — a tension that shapes agricultural policy debates to this day.