People can belong to groups. 
People belong to groups. 


An ethnic group is a group of people. They feel they belong together. They often share many things.
These shared things can be many things. They might speak the same language. They may share a religion. They might have the same traditions or history. Some groups are linked by how they look. Others are linked by where they live. 
Groups can change over time. Sometimes small groups split apart. This can happen if they live far away from each other. Other times, groups join together to make one big group. This process of making new groups is called ethnogenesis. 
People have different ideas about what makes a group. Some think these groups have always existed. Others think groups are made by rules in society. Long ago, the Greeks had their own ideas about this. They felt they were one group. They shared a language and customs. They also shared the same holy places. 
An ethnic group is a collection of people who feel they belong together. They use shared traits to tell themselves apart from other groups. These traits might be a common language or a specific culture. They might also share the same religion or history. Some groups are linked by their ancestors or how they are treated by society. People often use the word "ethnicity" to describe these connections. It is sometimes used in the same way as the word "nation." It can also be used like the word "race," though not every group sees itself that way.
Groups are not always the same forever. They can change through many different ways. People might join a new group by moving or changing their religion. They might also marry someone from a different group. This can cause groups to blend together into one big group. Sometimes, a large group splits into smaller tribes. This happens if people live far apart or marry only within their own group. 
We can group ethnicities in several different ways. Some groups focus on a shared language, like French Canadians. Others focus on a shared religion, such as Sikhs or Mormons. Some are defined by where they live, like the South Islanders of New Zealand. There are also groups defined by physical appearance or shared traditions. 
The word "ethnic" has a very long history. It comes from the Greek word "ethnos." In ancient times, the Greeks used it to talk about large groups or even flocks of animals. Later, it was used to mean people who were "foreign." In the 1930s and 1940s, the term changed again. It became a way to talk about cultural groups instead of using the word "race."
People have debated what ethnicity really is for a long time. Some thinkers in the early 20th century believed these groups were very old and natural. They thought these traits had lasted since the distant past. Other thinkers, like Max Weber, believed groups were social constructs. This means they are ideas created by society. In 1969, a researcher named Fredrik Barth argued that ethnicity is about how groups interact. He believed that being part of a group is something people constantly negotiate. This helps us understand how people connect with each other today.
An ethnicity is a group of humans who identify with one another. They do this by sharing perceived attributes that set them apart from other groups. These shared traits can include language, culture, or common traditions. They might also share a history, a religion, or a specific social treatment.
Groups are not static and can change over time through many processes. People may shift from one ethnic group to another through assimilation or acculturation. This can happen through intermarriage, adoption, or religious conversion. Groups can also change through language shift or amalgamation. Sometimes, a large group divides into smaller subgroups or tribes. This often happens due to physical isolation or endogamy, which is marrying within one's own group. 
Researchers categorize ethnicities based on which identity marker is most important. Ethno-linguistic groups emphasize a shared language or dialect, such as French Canadians. Ethno-national groups focus on a shared sense of national identity, like Austrians. Ethno-racial groups emphasize shared physical appearance, known as phenotype. 
The word "ethnic" has a complex history rooted in the Greek word "ethnos." In early antiquity, the term could refer to a large host of men or even a flock of animals. In Classical Greek, it meant a unique people group or a tribe. During the Hellenistic period, the meaning narrowed to refer to "foreign" or "barbarous" nations. In the 18th century, it was often used to mean paganism. By the 19th century, it returned to meaning something peculiar to a specific nation or race. The specific term "ethnic group" was first recorded in 1935. It eventually entered the Oxford English Dictionary in 1972.
Ancient history provides early examples of how people defined their groups. Around 480 BC, the historian Herodotus laid the foundation for ethnography. The ancient Greeks used the name "Hellenes" to describe their own ethnicity. Herodotus noted that Greek identity was defined by shared descent and shared language. It was also defined by shared sanctuaries, sacrifices, and customs. 
Scholars have long debated the true nature of ethnic identity. Early 20th-century primordialists believed ethnic groups were real, enduring phenomena from the distant past. In contrast, the instrumentalist approach views ethnicity as a political strategy. This view suggests groups use identity to gain wealth, power, or status.
Modern social scientists have added deeper layers to these theories. Max Weber argued that ethnic groups were "artificial" or social constructs. He believed that a shared sense of community actually created the group. He also noted that group formation was often driven by a desire to monopolize power. In 1969, anthropologist Fredrik Barth changed the field with his work on boundaries. He argued that ethnicity is not about being isolated from others. Instead, he focused on the interface between groups and how they negotiate identity through social processes of exclusion and incorporation.
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