In a 1907 lecture to Harvard undergraduates, Theodore Roosevelt warned against becoming too fastidious, too sensitive to take part in the rough hurly-burly of the actual work of the world. Roosevelt asserted that colleges should never turn out mollycoddles instead of vigorous men, and cautioned that the weakling and the coward are out of place in a strong and free community. A paradigm of ineffectuality and weakness, the mollycoddle was all inner life, whereas his opposite, the red blood, was a man of action. Kevin P. Murphy reveals how the popular ideals of American masculinity coalesced around these two distinct categories. Because of its similarity to the emergent homosexual type, the mollycoddle became a powerful rhetorical figure, often used to marginalize and stigmatize certain political actors. Issues of masculinity not only penetrated the realm of the elite, however. Murphy’s history follows the redefinition of manhood across a variety of classes, especially in the work of late nineteenth-century reformers, who trumpeted the virility of the laboring classes. By highlighting this cross-class appropriation, Murphy challenges the oppositional model commonly used to characterize the relationship between political machines and social and municipal reformers at the turn of the twentieth century. He also revolutionizes our understanding of the gendered and sexual meanings attached to political and ideological positions of the Progressive Era.