---
title: "History of eugenics"
chunk: 1/12
source: "https://en.wikipedia.org/wiki/History_of_eugenics"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T03:59:37.158532+00:00"
instance: "kb-cron"
---

The history of eugenics is the study of development and advocacy of ideas related to eugenics around the world. Early eugenic ideas were discussed in Ancient Greece and Rome. The height of the modern eugenics movement came in the late 19th and early 20th centuries.

== Ancient eugenics ==

According to Plutarch, in Sparta every proper citizen's child was inspected by the council of elders, the Gerousia, which determined whether or not the child was fit to live. If the child was deemed unfit, the child was thrown into a chasm. Plutarch is the sole historical source for the Spartan practice of systemic infanticide motivated by eugenics. While infanticide was practiced by Greeks, no contemporary sources support Plutarch's claims of mass infanticide motivated by eugenics. In 2007 the suggestion that infants were dumped near Mount Taygete was called into question due to a lack of physical evidence. Anthropologist Theodoros Pitsios' research found only bodies from adolescents up to the age of approximately 35.
Plato's political philosophy included the belief that human reproduction should be cautiously monitored and controlled by the state through selective breeding.
According to Tacitus (c. 56 – c. 120), a Roman of the Imperial Period, the Germanic tribes of his day killed any member of their community they deemed cowardly, unwarlike or "stained with abominable vices", usually by drowning them in swamps. Modern historians see Tacitus' ethnographic writing as unreliable in such details.

== Rediscovery ==

=== Socio-cultural backdrop of the time ===
Another question entirely is why eugenics rose, and did so in ways whose complexity still grounds a highly active field of study in intellectual history today.

==== The Malthusian component ====

==== The Lamarckian component ====

==== The Darwinian component ====

=== Galton's theory ===

Sir Francis Galton (1822–1911) systematized these ideas and practices according to new knowledge about the evolution of man and animals provided by the theory of his half-cousin Charles Darwin during the 1860s and 1870s. After reading Darwin's Origin of Species, Galton built upon Darwin's ideas whereby the mechanisms of natural selection were potentially thwarted by human civilization. He reasoned that, since many human societies sought to protect the underprivileged and weak, those societies were at odds with the natural selection responsible for extinction of the weakest, and only by changing these social policies could society be saved from a "reversion towards mediocrity", a phrase he first coined in statistics and which later changed to the now-common "regression towards the mean". (Incidentally, Galton also coined the phrase "nature versus nurture".)
Galton first sketched out his theory in the 1865 article "Hereditary Talent and Character", then elaborated further in his 1869 book Hereditary Genius. He began by studying the way in which human intellectual, moral, and personality traits tended to run in families. Galton's basic argument was that "genius" and "talent" were hereditary traits in humans, although neither he nor Darwin yet had a working model of this type of heredity. He concluded that, since one could use artificial selection to exaggerate traits in other animals, one could expect similar results when applying such models to humans. As he wrote in the introduction to Hereditary Genius:

I propose to show in this book that a man's natural abilities are derived by inheritance, under exactly the same limitations as are the form and physical features of the whole organic world. Consequently, as it is easy, notwithstanding those limitations, to obtain by careful selection a permanent breed of dogs or horses gifted with peculiar powers of running, or of doing anything else, so it would be quite practicable to produce a highly gifted race of men by judicious marriages during several consecutive generations.
Galton claimed that the less intelligent were more fertile than the more intelligent of his time. Galton did not propose any selection methods; rather, he hoped a solution would be found if social mores changed in a way that encouraged people to see the importance of breeding. He first used the word eugenic in his 1883 Inquiries into Human Faculty and Its Development, a book in which he meant "to touch on various topics more or less connected with that of the cultivation of race, or, as we might call it, with 'eugenic' questions". He included a footnote to the word "eugenic" which read: