The Other America refers to the hidden, impoverished population in the United States that was largely ignored by mainstream society and policymakers, particularly during the 1960s. This concept gained prominence through Michael Harrington's 1962 book of the same name, which highlighted the existence of poverty and social injustice that contradicted the nation's image of prosperity. By revealing the struggles faced by millions, it helped spark national attention and set the stage for significant social welfare reforms.