How did “fitter families” contests promote eugenics at American fairs?

At American county and state fairs, "fitter families" contests were used to promote eugenics by framing human reproduction through the lens of agricultural breeding. These contests encouraged the public to view human traits as heritable and subject to the same selective improvement long applied to livestock and crops.1

By setting up booths and awarding medals to families deemed "eugenically sound," organizers sought to normalize the idea that responsible individuals should prioritize eugenic principles when choosing marriage partners and planning families. These events often utilized exhibits that contrasted "favorable" traits with those labeled as "degenerate," urging fairgoers to adopt a progressive view of human heredity.1

This practice was part of a broader effort to influence cultural thought, suggesting that humans could and should control their own future evolution through selective reproduction. By equating the breeding of "better babies" with the selective breeding of animals, these contests aimed to gain popular support for the eugenic goal of perpetuating "good stock" while discouraging the reproduction of those deemed "unfit".12