In ancient India, the primary basis for categorizing individuals into different groups was their occupational roles. This system, known as the Varna system, divided society into four main classes: Brahmins (priests and scholars), Kshatriyas (warriors and rulers), Vaishyas (merchants and traders), and Shudras (laborers and servants).

The Manusmriti, also known as the Laws of Manu, is considered to be the primary source of information about the Varna system. It is a legal and social code that outlines the duties, rights, and responsibilities of each Varna, as well as the rules and regulations governing their interactions.

The term 'Jati' is used in ancient Indian texts to refer to the concept of purity and pollution. It is associated with the idea that certain groups or individuals are inherently pure or impure based on their birth or occupation.

Brahmins are considered to be the highest Varna in ancient Indian society. They are associated with priestly duties, scholarship, and spiritual knowledge.

The term 'Samsara' is used in ancient Indian texts to refer to the idea of rebirth and transmigration of the soul. It is believed that individuals are reborn into different bodies based on their actions and deeds in previous lives.

Gautama Buddha is known for his teachings on the concept of non-violence and ahimsa. He advocated for compassion and kindness towards all living beings, regardless of their caste or social status.

The term 'Dharma' is used in ancient Indian texts to refer to the idea of one's duty and obligations. It encompasses ethical and moral principles, as well as social and religious responsibilities.

The Upanishads are considered to be the primary source of information about the concept of Moksha. They are a collection of philosophical and spiritual texts that explore the nature of reality, the soul, and the path to liberation.

The term 'Moksha' is used in ancient Indian texts to refer to the idea of liberation from the cycle of rebirth. It is considered to be the ultimate goal of human existence and is achieved through spiritual realization and self-knowledge.

Adi Shankara is known for his teachings on the concept of Advaita Vedanta. He advocated for the idea that the individual soul (Atman) is identical to the universal soul (Brahman) and that the world is an illusion.

The term 'Vasudhaiva Kutumbakam' is used in ancient Indian texts to refer to the idea of the interconnectedness of all living beings. It translates to 'the world is one family' and emphasizes the unity and harmony among all creatures.

Chaitanya Mahaprabhu is known for his teachings on the concept of Bhakti Yoga. He emphasized the importance of devotion and love for God as a means of spiritual realization.

The term 'Samsara' is used in ancient Indian texts to refer to the idea of the soul's journey through different lives. It is believed that individuals are reborn into different bodies based on their actions and deeds in previous lives.

Mahatma Gandhi is known for his teachings on the concept of Karma Yoga. He emphasized the importance of selfless action and service to others as a means of spiritual realization.

The term 'Advaita' is used in ancient Indian texts to refer to the idea of the unity of all existence. It is associated with the teachings of Adi Shankara and emphasizes the non-duality of the individual soul (Atman) and the universal soul (Brahman).