Chapter 4 mentions that saints incarnate to 'protect the system of castes and stages of life.' What is the broader context of this mission as explained in the chapter?

In Chapter 4, the statement about protecting the system of castes and stages of life is presented within a larger context of societal chaos and the decay of religion. The chapter explains that a key sign of this decay is when Brahmins despise their own stage of life and Shudras try to become Brahmins, indicating a breakdown of social and spiritual order. Saints incarnate to restore dharma (righteousness) and awaken religion. Their purpose, as detailed in the chapter, is to guide people back towards a path of spiritual well-being and self-upliftment when they have lost their way. Therefore, protecting this system is part of a larger mission to destroy irreligion, protect the humble, and re-establish a society where individuals can pursue their ultimate goal (Paramartha) effectively.