British Empire: a former collective term for the territories under the leadership and control of the British crown, including those in the Commonwealth of Nations and their colonies, protectorates, dependencies and trusteeships.

Classism: discrimination or prejudice against people belonging to a particular social class.

Colourism: prejudice or discrimination against individuals who have a dark skin tone, especially among people of the same ethnic background.

Commonwealth: a voluntary association of independent nations and dependent territories linked by historical ties (for example as parts of the former British Empire) and co-operating on matters of mutual concern, especially regarding economics and trade.

Developed: developed countries or the developed world refers to countries or parts of the world that are wealthy and have many industries.

Discrimination: unjust treatment of a person or group, especially on the grounds of race, gender or sexual orientation.

Ethnicity: the state of belonging to a social group that has a common national or cultural tradition.

Fertile Crescent: an area of fertile land in the Middle East, extending around the Rivers Tigris and Euphrates in a semicircle from Israel to the Persian Gulf, where the Sumerian, Babylonian, Assyrian, Phoenician, and Hebrew civilizations flourished.

Hunter-gatherers: people who lived by hunting and collecting food rather than by farming. There are still groups of hunter-gatherers living in some parts of the world.

Indigenous: indigenous people or things belong to the country in which they are found, rather than coming there or being brought there from another country.

Lingua franca: a language used for communication among people of different mother tongues.

Prejudice: unreasoned dislike or hostility towards a particular social group.

Race: a grouping of humans based on shared physical or social qualities into distinct categories. Today race is viewed as a social construct, an identity that is assigned based on characteristics that have no inherent biological or physical meaning.

Social exclusion: exclusion or isolation from the prevalent social system and its rights and privileges, especially as a result of poverty or membership of a particular social group.

Social justice: justice in terms of distribution of wealth, opportunities, and privileges within a society. 

Underdeveloped: an underdeveloped country or region does not have modern industries and usually has a lower standard of living. Some people prefer to use the term developing.

Windrush: of, or relating to, the people who emigrated from the Caribbean to the United Kingdom in the period between 1948 and 1971, called from the Commonwealth to help fill post-World War II labour shortages.