Henry Ferdinand Suksdorf presents a history of humankind framed in the context of various races to have emerged throughout history.

The author believes each race of humankind undergoes a period of ascendance, followed by a peak wherein intellectual and civilizational achievements are made, and finally a ruinous decline into decadence. In support of his hypothesis, Suksdorf discusses the various civilizations and empires of the past, noting how each follows this pattern of a societal zenith, followed by a fall.

After listing the various successes and demises of twenty-two different races, the author concludes with the Human Race - a prediction that eventually, all of the various races will largely unite. This unity will produce a final peak for human society; a global brotherhood of man. Suksdorf's prognosis is that national identity will diminish in importance, and that a golden age will emerge in which new heights of societal and moral standards will be met owing to burgeoning activity and cooperation.