The Harappan civilization was an early tribe very similar to those of early Mesopotamia. They were able to build their structures from sun-baked mud bricks and built walls to protect their neighborhoods (Duiker). More and more tribes started flocking to this region because of their vast knowledge of iron and how to manipulate it for their own good and protection (History of India). One of these tribes is known as the Aryans. When they arrived, they discovered that the area was populated by farmers and some of them still relied on hunting and fishing. The Aryan tribe introduced the caste system, which survived for many centuries. This system allowed the Aryan tribe to control the population by defining key roles in society and then assigning them to the people (US History). This system was composed of certain levels. The first in the class were called the Brahmins, who were the priests. Then there were the Kshatriya who were the warriors, the Vaisya, who were merchants, then the Sudras, who made up the majority of the population, and finally the untouchables, or slaves (Duiker). Also due to the number of different tribes coming to India, the major religions evolved, including Buddhism. Siddhartha Gautama founded Buddhism in the 6th century. Originally from northern India, he was born into a ruling family (Duiker). According to legend, as he grew older, he dedicated his life to understanding