What do we mean by 'race'?

Modern science agrees there is no biological basis for dividing humanity into separate 'races'.

Race is a way of grouping people by physical features such as skin colour. It feels natural, but it is a social construct - an idea created by societies, not a fact found in biology. Human beings share over 99.9% of their DNA, and there is more genetic variation within any so-called racial group than between groups.

• Racism is the belief that these groups can be ranked, with some 'superior' to others.
• In the 1800s, Europeans dressed this belief up in the language of science.
• This 'scientific' racism was then used to justify slavery, empire and later, mass murder.

Classifying humanity

European naturalists began sorting people into fixed types - and quietly ranking them.

During the Enlightenment, scientists tried to classify all living things. Carl Linnaeus (1735) and Johann Blumenbach (1795) divided humans into a handful of 'varieties' based on skin colour and skull shape. Blumenbach coined the term Caucasian and, crucially, placed Europeans at the top of his scheme.

• Classification looked neutral, but it built in a hierarchy with Europeans as the ideal.
• These categories were shaped by the era of slavery and expanding empires.
• Later thinkers treated these invented types as if they were fixed and natural.

Scientific racism

Measuring skulls and bodies to 'prove' a ranking that had been decided in advance.

In the 1800s, racists used tools like craniometry (measuring skull size) and phrenology (reading bumps on the head) to claim that some groups were more intelligent than others. We call this pseudo-scientific racism because it used the appearance of science while ignoring proper method - researchers looked for evidence to confirm what they already believed.

• Data was selected, misread or invented to support European superiority.
• The conclusion (a racial hierarchy) was assumed before the 'research' began.
• It gave slavery, colonial conquest and segregation a respectable, 'scientific' excuse.

Social Darwinism

Twisting a theory about nature into an excuse for human cruelty.

Charles Darwin's On the Origin of Species (1859) explained how species change through natural selection. Others - above all Herbert Spencer, who coined the phrase survival of the fittest - wrongly applied this to human societies. Social Darwinism claimed that rich nations, classes and 'races' were dominant because they were naturally superior.

• It presented inequality and poverty as natural and even necessary.
• It justified imperialism: conquest was framed as the 'strong' out-competing the 'weak'.
• Darwin's biology was distorted; he did not argue that some peoples should rule others.

Eugenics

If society could breed better crops and cattle, some argued, why not breed 'better' humans?

Eugenics (from Greek for 'well-born') was named by Francis Galton, Darwin's cousin, in 1883. It aimed to 'improve' the human population by encouraging the 'fit' to have children (positive eugenics) and stopping the 'unfit' from doing so (negative eugenics) - through segregation, marriage bans and forced sterilisation.

• 'Unfit' was defined to include the poor, disabled, mentally ill and non-white people.
• It turned pseudo-scientific racism into a programme for state action.
• By the early 1900s, eugenics was mainstream and respected in Europe and the USA.

Eugenics in the United States

America was the first country to turn eugenics into large-scale government policy.

From 1907, US states passed laws to forcibly sterilise people judged 'unfit'. In the 1927 case Buck v. Bell, the Supreme Court approved sterilisation, with Justice Oliver Wendell Holmes writing the notorious line, 'Three generations of imbeciles are enough.' Tens of thousands of Americans were sterilised without consent, and the 1924 Immigration Act used eugenic thinking to exclude 'undesirable' groups.

• Victims were disproportionately poor, disabled and from minority communities.
• US eugenics was funded, organised and internationally admired.
• German racial scientists studied the American laws closely as a model.

Colonialism and the Herero and Nama genocide

In German South West Africa (today Namibia), racial ideas produced what many call the first genocide of the 20th century.

When the Herero and Nama peoples rose against German colonial rule, General Lothar von Trotha issued an extermination order (1904). Survivors were driven into the desert or into concentration camps, where thousands died. Skulls of the dead were shipped to Germany to be used in 'racial science' research.

• Historians estimate roughly 65,000 Herero and 10,000 Nama were killed.
• Racial theory recast mass killing as the 'natural' removal of an 'inferior' people.
• The same ideas of camps and racial hierarchy would reappear in Europe decades later.

The Nazi 'master race'

The Nazis built an entire state around the pseudo-science of an 'Aryan' master race.

After 1933, Nazi Germany made racial hierarchy the basis of law. They invented an Aryan master race (Herrenvolk) and defined Jews, Roma, Black people and others as inferior 'enemies'. The Nuremberg Laws (1935) stripped Jews of citizenship and banned marriage between Jews and other Germans - turning pseudo-scientific racism into a legal system of exclusion.

• A 1933 law allowed the forced sterilisation of the 'hereditarily unfit', echoing US eugenics.
• Propaganda, schools and science all taught racial ranking as fact.
• Exclusion escalated step by step: from citizenship, to property, to life itself.

The Holocaust

Racial ideology culminated in the systematic, industrial murder of millions.

During the Second World War the Nazi regime carried out the Holocaust - the deliberate, organised murder of about six million Jews, alongside Roma, disabled people, political opponents and others deemed 'unworthy of life'. This was the horrifying endpoint of a century of racial thinking that had ranked human beings and then acted on that ranking.

• The disabled were among the first victims, through the earlier 'euthanasia' programme.
• Bureaucracy, science and technology were harnessed to killing on an industrial scale.
• The Holocaust stands as the most extreme warning of where racial ideas can lead.

Race ideas and South Africa

The same currents of racial thinking shaped segregation and apartheid at home.

South Africa was part of this global story. Colonial and settler governments used the same pseudo-scientific ideas to justify conquest, land dispossession and segregation. After 1948, apartheid built an entire legal system on racial classification - most starkly in the Population Registration Act of 1950, which sorted every person into an official 'race'.

• Historians often compare early apartheid laws with Nazi racial legislation.
• In both, the state, not biology, decided who belonged to which 'race'.
• Understanding the false science of race helps explain why apartheid was unjust at its root.

From classification to catastrophe

1. 1735 Linnaeus classifies human 'varieties'
2. 1859 Darwin publishes On the Origin of Species
3. 1883 Galton names 'eugenics'
4. 1904 Herero and Nama genocide begins
5. 1927 US Buck v. Bell approves forced sterilisation
6. 1935 Nazi Nuremberg Laws
7. 1941-45 The Holocaust
8. 1948-50 Apartheid classification laws in South Africa

What we have learned

Ideas have power: a false science of race, once believed and legislated, cost tens of millions of lives.

Across this lesson we traced how 'race' was invented, not discovered; how pseudo-science (Social Darwinism and eugenics) gave racism a respectable mask; and how, when governments wrote these ideas into law, the results ranged from forced sterilisation to colonial genocide and the Holocaust. Studying this history is a warning about the danger of dehumanising ideas - and a defence of human rights and human dignity.