The document discusses the Indo-Aryan language society that originated in northern India in the late Bronze Age. It notes that the Indo-Aryans spoke an early form of Sanskrit and introduced a patriarchal social structure based around cattle herding and agriculture. Their religious texts like the Vedas and later epics such as the Ramayana and Mahabharata came to heavily influence Hinduism. The Indo-Aryans also developed a rigid caste system that divided society based on birth and skin color and emphasized the higher status of lighter-skinned Aryans. Sanskrit became the dominant language and played an important role in economic and cultural exchange.