The book begins by addressing the difficulties of applying zoological nomenclature to man, establishing that the vast combinations of somatological units form the ethnic groups known as peoples and nations. The author methodically details somatic characters, drawing sharp comparisons between man and anthropoid apes regarding their upright posture, spinal curves, brain development, and skull structure. Stature, teguments, hair structure, and pigmentation are analyzed as persistent racial markers, supported by extensive craniometrical data and measurements of living subjects. The text then transitions to the physiological functions of nutrition, respiration, circulation, and reproduction, discussing human cosmopolitanism and the complex dynamics of racial hybridisation and environmental adaptation.
Moving beyond biology, the author examines ethnic characters, defining progress through the twin pillars of innovating initiative and the conservative power of tradition. Linguistic characters are explored across structural divisions, ranging from monosyllabic and agglutinative languages to inflectional forms, alongside the evolution of communication through gestures, signals, and writing systems. The sociological section covers material life in exhaustive detail, tracing the origins of alimentation, fire-making techniques, pottery, stimulants, habited structures, and the evolution of dress and adornment from primitive ornament.
Subsequent chapters focus on the means of existence, detailing primitive tools, hunting, fishing, agriculture, and domestication. The core of the volume is dedicated to the systematic classification of races and peoples across Europe, Asia, Africa, Oceania, and America, examining their prehistoric origins and modern distributions. The work concludes with an appendix of human body dimensions, offering professional anthropologists and students an invaluable compendium of collected data on human diversity.
