There were four castes among Hindu: Brahmans, Kshattriyas, Vaishyas, and Shudras; the caste of the student, the caste of the warrior, the caste of the merchant, and the caste of the laborer. Nobody can deny that there was great wisdom in this division; for there are four different tendencies in man. But in the end it resulted in disaster; the people became weak owing to these divisions, and the link of brotherhood was destroyed. This example of the Hindu race is in itself an example for human beings in the reconstruction of the world.