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Agriculture has had a profound impact on the natural world, especially over the course of the 20th century. In many places, agriculture is now increasingly industrialized, leading to monocultures that are reliant on external mechanical, biological, and chemical inputs (e.g., tractors, hybrid seeds, and pesticides). Many geographers and others are beginning to question the sustainability of these conventional systems. Indeed, industrial agriculture has hit a crisis point—especially when considered in combination with the issues of environmental erosion, climate change, and depleting fossil fuels—and politicians, agribusiness leaders, environmentalists, and farmers alike now advocate for “sustainable agriculture.” However, sustainable agriculture is a poorly defined and highly politicized term, and it clearly means different things to different stakeholders. This is because sustainable agriculture is a philosophical approach, rather than a specific production system, that promotes social, ecological, and economic health in food- and fiber-producing lands and communities. A diversity of locally based low-input and knowledge-intensive farm systems exist that follow the principles of sustainable agriculture. As these holistic approaches to cultivation and animal husbandry are further refined and communicated, their legitimacy and widespread adoption is inevitable.

Agriculture's Roots

It is generally understood that agriculture was born around 10,000 to 13,000 years ago, when hunter-gatherers began to domesticate wild plant and animal species for food, predominately along the Fertile Crescent, an event called the Neolithic Revolution. By domesticating plants and animals, these “first farmers” produced food surpluses that supported permanent settlements, which led to rapid population growth, specialized labor, and the development of modern civilization. Agriculture has radically transformed humanity's trajectory as a species and its relationship with and impact on the natural world, creating many opportunities and challenges, especially over the past century.

The Rise of Industrial Agriculture

The rise of industrial agriculture in the 20th century—predicated on mechanical, biological, and chemical technologies—exceeded in magnitude all previous changes in farming. Governments and industry promoted industrial agriculture, as it was their belief that Fordist principles of manufacturing and large-scale production could be applied to agriculture. After World War II, the chemicals developed for military activities were subsequently used in agriculture as synthetic pesticides and fertilizers, and in combination with tractor power, these inputs dramatically increased labor and land productivity.

Farmer-led plant breeding was quickly replaced by expert-based approaches using the new science of genetics, leading to the development of hybrids and other high-yielding and high-input varieties that were distributed worldwide during the Green Revolution. The discovery of antibiotics and vaccines enabled industrial-scale livestock production—often called “factory farming”—in which animals are raised in densely crowded spaces without a significant buildup of disease. Indeed, industrial agriculture increased global food production and helped feed and ultimately increase the world's human population, now estimated at 6.8 billion people. Despite these significant production benefits, industrial agriculture has caused substantial social, ecological, and genetic erosion worldwide.

Social, Ecological, and Genetic Erosion

The shift toward industrial agriculture has had adverse consequences for farmers, rural communities, and the environment. Many suggest that farmers have become beholden to a “technology treadmill” with the rise of mechanical, biological, and chemical innovations, as increases in production depress prices and require that farmers adopt ever newer technology to stay competitive. Larger farms have generally been able to adopt new technology more easily, which has created fierce competition within rural communities, and many smaller family farms have not been able to stay viable. High input costs remain the number one obstacle to farm profitability. In North America, farmers are facing the worst farm income crisis in history, with the countryside being increasingly depopulated, while agribusiness has garnered record profits. In the global South, reports of farmer suicides are becoming pervasive, as mounting debts tear apart the social fabric of many communities. The environmental costs of industrial agriculture are also placing enormous pressure on human and ecological systems.

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