Kindly do not post rubbish.
Its bad enough when foolish hindus post nonsense about Hinduism. Last thing we need is to have Muslims pretend to be experts on Hinduism.
Purusha is not the "Primeval man".
This is from the Manusmriti,
" Shudro brahmanatameti brahmanashchaiti shudratam.
Kshatriyanjalamevamtu vidyadvaishyattathaiva cha."
Meaning - An uneducated Shudra can become a brahmin by acquiring learning, merit, virtuous life, etc.and a brahmin lacking in above traits becomes a Shudra.
This principle of merit, action and personality traits (Guna-karma-Swabhava) also holds good for Kshatriya and Vaishya for their upward or downward mobility.
lol....ok
......... now shoo. Take a hike lungi.