The Broiler Revolution: How the Twentieth Century Made Meat a Daily Staple

Animal & protein

What it is

The second and far more radical democratization of meat came after World War II in the form of industrial or "factory" farming — the application of industrial logic, mechanization, genetic optimization, and pharmaceutical support to the raising of chickens, pigs, and cattle at unprecedented scale and unprecedented efficiency. The result was a collapse in the real cost of meat that exceeded anything the railroad and meatpacking industry had achieved. Chicken, which had been a special-occasion food in 1940 — more expensive per pound than beef, eaten primarily on Sundays and holidays — became by 1970 one of the cheapest protein sources available in the American supermarket. The same process, applied to pigs and cattle, made pork chops and hamburger into ordinary weekday food. For the first time in human history, meat at every meal became economically possible for the majority of the population of wealthy industrialized nations.

History & domestication

The transformation of chicken into a commodity food is one of the most dramatic agricultural stories of the twentieth century, and it began in an unlikely place: the Delmarva Peninsula (Delaware, Maryland, Virginia), where a housewife named Cecile Steele accidentally received 500 chicks instead of the 50 she had ordered from a hatchery in 1923. Rather than returning them, she raised them for meat — not eggs — and discovered that she could sell them at a profit. This small accident initiated the modern broiler chicken industry, which by the late twentieth century would produce billions of animals annually in the United States alone.

The key innovations that made the broiler revolution possible came in sequence:

Confinement raising: Moving chickens from outdoor yards into enclosed houses where they could be raised at high density, year-round, regardless of weather, dramatically reduced the land area and seasonal constraints of poultry production. The enclosed house also enabled environmental control — temperature, lighting, ventilation — that accelerated growth and reduced disease loss.

Genetic selection: Dedicated breeding programs, most notably at the University of Delaware and in commercial hatcheries, selected aggressively for rapid growth and feed conversion efficiency (the ratio of feed consumed to weight gained). The modern Cornish Cross broiler chicken — the bird in virtually every American supermarket — reaches market weight (roughly 6 pounds live) in 47 days, compared to roughly 16 weeks for the chickens of 1925. This four-fold acceleration in growth rate was achieved through genetic selection alone, without genetic modification in the molecular-biology sense. The animals are so optimized for rapid muscle accretion that they experience cardiovascular and skeletal problems if they live beyond market age; they were not designed to live.

Antibiotics at subtherapeutic doses: The discovery in the late 1940s that continuous low-level antibiotic administration to livestock promoted faster growth — initially attributed to a vitamin-like effect, now understood as a result of suppressing subclinical gut infections that divert energy from growth — transformed industrial animal production. By the 1960s, low-level antibiotic inclusion in animal feed was near-universal in American industrial livestock farming. The practice dramatically increased the speed and efficiency of production and reduced the mortality losses in high-density conditions; it also, over subsequent decades, contributed to the evolution of antibiotic-resistant bacteria in ways that constitute one of the most serious public health challenges of the early twenty-first century.

Vertical integration: The modern poultry industry is distinguished by a specific form of corporate organization — vertical integration — in which a single company (Tyson Foods, Perdue, Pilgrim's Pride) owns the genetics (the breeding flocks), the hatcheries, the feed mills, the processing plants, and the distribution network, while contracting with independent farmers to actually raise the birds. The contract grower provides the land, the houses, the labor, and the utilities; the integrator provides the chicks, the feed, the veterinary support, and the marketing. This system transfers much of the financial risk to the farmer while concentrating the profits at the integrator level — an arrangement that has been extensively criticized for its effects on rural farming communities but that proved extraordinarily efficient at reducing the price of chicken.

The specific price trajectory of chicken in the United States: In 1935, whole chicken retailed for roughly $6.50 per pound in inflation-adjusted 2020 dollars. By 1960, it had fallen to roughly $3.50. By 1980, to roughly $2.00. By 2000, to roughly $1.50. By 2020, boneless skinless chicken breast could be purchased for less than $2.00 per pound in many American markets — while the inflation-adjusted minimum wage had declined relative to the 1970s. Chicken had become, essentially, the cheapest animal protein that money could buy, available to virtually any American household above the poverty line.

The post-war hamburger and the beef equivalent

Chicken tells the cleanest version of the factory farming story because the transformation was so rapid and so complete. The beef story is parallel but more complex, because cattle are inherently more difficult to raise in extreme confinement and have a much longer production cycle. The key innovations in industrial beef production were the concentrated animal feeding operation (CAFO, or feedlot), in which cattle are transitioned from grass to a high-energy grain diet (primarily corn) for their final months before slaughter, dramatically accelerating weight gain; and the development of hormonal growth promotants (diethylstilbestrol, later replaced by natural and synthetic steroid implants after DES was found to be carcinogenic in humans) that further accelerated growth and improved feed conversion.

The social monument to the democratization of beef is the hamburger, and the monument to the hamburger is McDonald's. When Richard and Maurice McDonald opened their San Bernardino drive-in in 1940 and Ray Kroc began franchising it in 1954, they were participating in a food system that was simultaneously collapsing the cost of beef and concentrating the physical transformation of cattle into a small number of enormous, highly efficient processing facilities. By the late twentieth century, four companies (Cargill, Tyson, JBS, and National Beef) controlled roughly 80% of American beef processing — a concentration of market power with no historical precedent in the food system.

The hamburger — ground beef formed into a patty and grilled or fried — is the perfect symbol of industrial meat democratization because it performs two simultaneous operations: it makes cheap cuts and trimmings taste acceptable through the fat distribution achieved by grinding, and it removes the symbolic distance between the living animal and the food on the plate. A hamburger patty looks nothing like a cow; it is the final and complete severance of the animal from the meat, the culmination of a process begun when the Norman conquerors gave the meal a different name from the beast.

Pork and the rise of the other white meat

Industrial pig production followed a similar trajectory, concentrated geographically in the Corn Belt states (Iowa, North Carolina, Minnesota) where cheap grain was available. The modern industrial hog barn — housing thousands of pigs in individual crates or group pens on concrete slats over manure lagoons — achieved enormous efficiencies of scale while generating significant environmental externalities in the form of waste management, groundwater contamination, and air quality impacts on surrounding rural communities (communities that are disproportionately low-income and disproportionately communities of color, a pattern documented extensively in North Carolina where major industrial hog operations concentrate).

The pork industry's rebranding campaign in the 1980s — "Pork: The Other White Meat," launched in 1987 — was a specific response to the consumer preference shift toward chicken that the broiler revolution had catalyzed. By marketing pork as a lean, health-forward alternative to the now-dominant chicken, the pork industry attempted to hold market share against the commodity chicken that had undercut it on price. The campaign was remarkably successful, running until 2011 and fundamentally reshaping consumer perception of pork.

The ecological costs

The factory farming revolution produced cheap meat for a rapidly growing human population, but the ecological costs were, in the language of economics, heavily externalized — shifted onto the environment, onto the workers in processing plants, onto the rural communities hosting CAFOs, and onto the animals themselves.

The environmental ledger includes:

Greenhouse gas emissions: The global livestock sector accounts for roughly 14.5% of total anthropogenic greenhouse gas emissions, according to the United Nations Food and Agriculture Organization — more than the entire global transportation sector. Cattle in particular are significant sources of methane, both from enteric fermentation (the digestive process of ruminants) and from manure management. A single cow produces roughly 70-120 kilograms of methane annually, and there are roughly one billion cattle on Earth.

Land use: Approximately 80% of global agricultural land is used for livestock raising (including both grazing land and cropland producing animal feed), while livestock products provide roughly 20% of global caloric supply and 40% of global protein supply. This land-use inefficiency is the most fundamental ecological critique of meat production: it takes far more land, water, and energy to produce a calorie of animal protein than a calorie of plant protein.

Antibiotic resistance: The routine use of antibiotics in industrial animal agriculture — which accounts for roughly 70-80% of all antibiotic use in the United States — has contributed to the evolution of antibiotic-resistant bacterial strains that represent a growing public health emergency. The WHO has identified antimicrobial resistance as one of the top ten global public health threats; industrial animal agriculture is a primary driver of its acceleration.

Water use: The production of one pound of beef requires approximately 1,800 gallons of water (including the water embedded in feed crops, drinking water, and processing); one pound of chicken requires roughly 500 gallons; one pound of tofu requires roughly 300 gallons.

Reference notes

Cross-link: Factory Farming (industry/historical entry)
Cross-link: Broiler Chicken (ingredient entry)
Cross-link: Hamburger / Ground Beef (dish/ingredient entry)
Cross-link: Industrial Pork Production (industry entry)
Cross-link: CAFO / Concentrated Animal Feeding Operation (industry entry)
Cross-link: Antibiotic Resistance and Food (health/science entry)
Cross-link: Food Safety Regulation History (historical entry)
Suggested tag: Food History, Industrial Food, Environmental Impact, Food Science

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