A civilization is a big group of people. 

A civilization is a very large group of people. 

A civilization is a very large and complex society. 
Civilizations need a lot of food to grow. Many people grow crops like grain. This creates a surplus, which means extra food. 
These societies have many social classes. There is often a small group of leaders. These leaders hold much of the power. They may use taxes to run the state. A state is a type of government.
To keep track of things, many use writing. 
A civilization is a very large and complex way for people to live together. 
To make a civilization work, people follow specific steps to manage their resources. 

History shows us that these large societies began to emerge a long time ago. 
Many interesting facts define how these societies function day to day. Civilizations use writing to keep track of important records. For example, the people of Sumer were among the first to develop writing. This helped traders and government workers manage their business. Other groups, like the Inca in the Andes, used knotted strings to record information instead. Many civilizations also use money to make trading easier. This is much faster than just swapping one item for another in a market.
Understanding civilization helps us see how the modern world was built.
A civilization is a highly complex society. It is characterized by several specific developments. These include the creation of a state and social stratification. It also involves urbanization and symbolic communication systems. Writing is a common example of such a system. Most civilizations are organized around densely populated settlements. These settlements are divided into rigid social classes. This structure often includes a ruling elite. The rest of the population may live in urban or rural areas. These people engage in intensive agriculture, mining, and trade. Civilization concentrates power to extend human control over nature. 
To understand how these societies function, we must look at their mechanisms. Many civilizations depend on intensive agriculture for subsistence. Most permanent civilizations rely on cereal agriculture. This includes using techniques like irrigation or crop rotation. These methods help create a food surplus. A surplus means there is more food than people need to survive. This extra food allows for a division of labour. Some people can become specialists instead of farmers. These specialists include soldiers, artisans, and priests. This specialization is a defining trait of civilization. 
There are different ways to classify these social structures. Researchers like Morton Fried and Elman Service used specific categories. First are hunter-gatherer bands, which are generally egalitarian. Second are horticultural-pastoralist societies. These usually have two classes: chiefs and commoners. Third are chiefdoms, which are highly stratified. They include kings, nobles, freemen, serfs, and slaves. Finally, there are civilizations. These have complex social hierarchies and organized governments. Some scholars, such as Andrew Nikiforuk, note that many pre-modern civilizations relied on slavery. This meant they used the energy of enslaved people to build cities.
History shows us when these complex systems first appeared. The earliest civilizations emerged during the Neolithic Revolution in West Asia. This period led to an urban revolution and state formation. This process involved the appearance of a governing elite. The word civilization comes from the Latin word *civitas*, meaning city. In the 1760s, the term began to be used in English. Adam Ferguson used it to describe human progress. During the Age of Enlightenment, it was often opposed to "barbarism." However, the term has changed over time. In the 19th century, people began using "civilizations" as a countable noun. 
Economic systems in civilizations are also quite complex. People in cities can accumulate more personal possessions than nomads. They may also own private land. Because not everyone grows food, they must use a market system. They trade goods or receive food through taxation. Early cultures used gift economies or barter. By the early Iron Age, civilizations developed money. Money acts as a medium of exchange for complex transactions. This helps people who do not know each other trade effectively. However, control over money often benefits the political elites. 
Writing is another important hallmark of these societies. It often appears alongside complex bureaucracies or conquest states. Traders and bureaucrats used writing to keep accurate records. The people of Sumer were among the first to develop this. However, writing is not always required for a civilization. The Inca civilization in the Andes used a different system. They used knotted strings of different lengths to record information. This shows that different cultures find different ways to manage complexity. 
Not everyone in history viewed civilization as purely positive. In the 18th century, Jean-Jacques Rousseau argued that civilization was unnatural. He believed it was driven by social and rational forces. He felt it could lead to social vices like envy or hypocrisy. Later, German philosophers like Nietzsche also explored these ideas. They viewed cultures as natural organisms with a "folk spirit." This contrasts with the rational, material progress of civilization. These debates show that the impact of civilization is a deeply studied topic.
Finally, we can see how civilization relates to broader human systems. It connects to how we manage resources and power. It also relates to how we define culture. Some thinkers argue that civilization and culture are not the same. For example, some cultures are not described as civilizations. We can also look at physical health to judge living standards. Average stature can measure access to food and freedom from disease. Interestingly, some studies show that people in the Middle Ages were taller than those in the Roman Empire. This shows that social complexity does not always mean better living conditions.
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