Plain Facts for Old and Young — Inside the Classic

Nature as Arbiter of Marital Conduct

Kellogg devotes considerable space to arguing that sexual intercourse during pregnancy violates 'Nature's rule.' He points to animals, where 'the female decides when the approaches of the male are allowable,' and insists that human beings, lacking such instinct, must use reason to follow the same prohibition. The reasoning is circular: because animals abstain during pregnancy, humans should too; because humans can choose otherwise, they must be educated to choose correctly.

The excerpts show Kellogg attributing the 'steady growth of the sexual passion' to 'habitual unrestraint' within marriage, and he warns that the wife and offspring are 'the chief sufferers.' Yet he offers no clinical data to support these claims—only appeals to 'the remarkable wisdom nature invariably displays.' This section of the book reads less as medical advice and more as a moral treatise dressed in scientific language, a pattern that recurs throughout the available text.

Condemnation of Infanticide and Abortion

In a chapter titled 'Infanticide and Abortion,' Kellogg declares these practices 'terrible crimes' that have 'reached such a magnitude as to seriously affect the growth of civilized nations.' He equates abortion with the prevention of conception, calling it 'the same crime postponed till a later period.' The language is apocalyptic: he quotes another physician's 'loathing' and describes the destruction of a child in the womb as 'utterly repugnant.'

Notably, Kellogg does not provide statistics or case studies to support his claim of epidemic proportions. Instead, he relies on rhetorical force and appeals to moral disgust. The catalog subject 'sexual ethics' fits this content, but the excerpts suggest that Kellogg's ethics are absolute and biologically deterministic, leaving no room for nuance or individual circumstance. His tone here is more preacher than physician.

The Limits of Scientific Authority

Despite Kellogg's credentials—member of the American Public Health Association, the American Society for the Advancement of Science, and the Michigan State Board of Health—the excerpts reveal a work that subordinates empirical evidence to moral conviction. The preface promises 'straightforward, simple, and concise' information, but the arguments rely on analogies to animal behavior and assertions about 'Nature's rule' rather than on controlled observation or statistical data.

For example, when discussing cohabitation during pregnancy, Kellogg asks, 'why should an opposite course not serve an unwise and bad purpose with us?' The question assumes its answer. The book's structure—anatomical description followed by moral application—mirrors this tension: science provides the vocabulary, but morality provides the verdict. Readers expecting a dispassionate medical manual will instead find a prescriptive guide to sexual conduct rooted in 19th-century health reform.

Kellogg's Plain Facts is best approached as a document of its time—a blend of progressive health reform and conservative moralism. Readers should note that the excerpts represent only a fraction of the 124,000-word text; the full work may contain more clinical detail or a broader range of topics. However, the available passages consistently prioritize moral instruction over medical evidence, making the book a valuable primary source for studying late-19th-century attitudes toward sexuality, marriage, and reproduction.

There’s something tender in how that old manual worried over the body’s secrets, and it makes me think of my own grandfather’s quiet lists—recipes, jokes, names of birds. He left behind a notebook like A Grandpa's Notebook Ideas, Models, Stories and Memoirs to Encourage Intergenerational Outreach and Communication — Story, Setting & Ideas, a gentler kind of plain fact. Different centuries, same ache to pass something on before it’s gone.