Investiga acerca de las castas de la India, cuáles son, quiénes corresponden a cada cual y qué relación existe entre ellas y la creencia de la reencarnación de las almas

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

an era of negotiation.

is that an answer to your question?

"they had a large area of land that they owned."

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.