In Bhagavad Gita, Krishna says to Arjuna that since he is Kshatriya, he should do the war and do his duties of being a kshatriya. Earlier we had brahmin, kshatriya, vaishya and shudra. And Krishna tells Arjuna that one should do his duties. But now in this age, how do we decide our duties?
EDIT: Lord said that the brahmins are the head, the kshatriyas are the hands, the vaishyas are the stomach, and the shudras are the feet of the Lord. I wished to know that since the lifestyle of humans has changed so much, how does one know his duties now? This does not answer my question