The Third Estate was a social class in France during the Ancien Régime. It was made up of individuals who were not part of the clergy (First Estate) or the nobility (Second Estate). The Third Estate comprised a diverse range of people, including poor servants, small peasants, landless laborers, artisans, big businessmen, merchants, lawyers, and more. This answer will provide a detailed explanation of each group that made up the Third Estate.

Poor servants and small peasants, landless laborers:
- Poor servants: This group included domestic workers, such as maids, cooks, and gardeners, who worked for nobles or wealthy families. They were often poorly paid and lived in difficult conditions.
- Small peasants: Small peasants were farmers who owned small plots of land and cultivated crops for their own subsistence. They formed a significant portion of the Third Estate and were often burdened with heavy taxes and feudal obligations.
- Landless laborers: This group consisted of individuals who did not own land and worked as agricultural laborers or in other manual labor jobs. They were often the most impoverished members of society and had limited economic opportunities.

Peasants and artisans:
- Peasants: Peasants were farmers who owned larger plots of land and produced surplus crops. They were often subject to feudal obligations and paid taxes to the nobility. Peasants formed the majority of the Third Estate and were an essential part of the agricultural economy.
- Artisans: Artisans were skilled craftsmen and women who worked in various trades, such as blacksmithing, carpentry, weaving, and pottery. They played a crucial role in the production of goods and services and were an important part of the urban economy.

Big businessmen, merchants, lawyers, etc.:
- Big businessmen: This category included wealthy individuals who owned large businesses, such as factories, mines, and trading companies. They amassed significant wealth and often had close ties to the nobility and the monarchy.
- Merchants: Merchants were individuals involved in trade and commerce. They bought and sold goods, both locally and internationally, and played a crucial role in the economic development of towns and cities.
- Lawyers: Lawyers were professionals who provided legal services to individuals and businesses. They played a key role in the administration of justice and often had significant influence and power.

In summary, the Third Estate comprised a wide range of individuals, including poor servants, small peasants, landless laborers, peasants, artisans, big businessmen, merchants, lawyers, and more. This diverse social class played a crucial role in society and was the driving force behind the French Revolution, demanding equal rights and representation.

It is given in the chapter that first and second estates only comprise nobility and clergy so all other professions are in third estate.