Basant: Do manavaantar ke madhya me kya hota hai? Kya koi pralay jaisi ghatna hoti hai?
Swami Ram Swarup: Nothing happens between two manvantras but time labours on along with daily worldly events as happens between the period of Sunday and next day of Monday.

G P: Pranam Swamij i, What is the definition of a Brahmin according to Vedas?
Swami Ram Swarup: My blessings to you. Un this regard, I paste my relevant answers:-
Four Ashrams

There are four ashrams in the life, Brahamcharya ashram up to age of 25 years, Grihastha ashram up to 50 years, Vanprasth ashram up to 75 years and Sanyas ashram up to 100 years. So one should try to discharge his duties of every ashram knowing duties thereof and then must take sanyas, but if anybody else is interested to take sanyas being ascetic by true speech etc., then he can take sanyas even at an early age.

I have already written about caste system (varn vyavastha). Yajurveda mantra 31/11 says that caste is based on present deeds (karmas) and not by birth. The sense of Mantra is that if a son of shudra studies Vedas, controls senses/organs and mind, does practice of Ashtang yoga, then he will be considered Brahmin and a Brahmin who has no such qualities he will be treated as shudra etc., etc. There is no caste system in Vedas based on birth and the other holy books like Manusmriti, six shastras, Upnishads, Valmiki Ramayana, Mahabharat (Bhagwad Geeta) etc., were written by ancient Rishis/Munis based on only the knowledge of Vedas, so no caste system exists therein based on birth.

In this connection Yajurveda mantra 31/11 also says that he who knows Vedas and God, he is Brahmin being most supreme in the world like a mouth in the body. So anyone (of any caste) can be a Brahmin by hard studies of Vedas, practising Ashtang yoga therein and thus realizing God. One who has physical power in his arms, he is Kashtriye-Rajput to protect the country. So anyone can be a Rajput, holding the said qualities. One who has powers in his thighs to travel and to do hard work to establish business, he is Vaishya (businessman). One who has not studied, based on his qualities that he could not gain the qualities of Brahmin, Kashtriye and Vaishya, he is shudra (may be of any caste).

There is a symbolic story in Mahabharat. That once Yudhistar saw that his brother Bhima was caught by a huge python. Yudhistar asked python that my brother is a great warrior having sufficient power that you could not catch him. So really you are not python, tell me, who you are. Python replied that he was a yaksha. O Yudishtar, if you would answer my question, then your brother would be released. Yaksha asked Yudhistar that if a son of Brahmin takes wine, meat, gambles and does bad deeds then whether he will be considered as Brahmin and when a shudra (lowest caste) reads Vedas, does practice of Ashtang yoga, controls his five senses, five organs and mind and does always pious deeds then whether the son of such shudra will remain shudra? Yudhistar replied that the Brahmin will be treated as shudra and shudra will be treated as Brahmin.

King Janak called all the emperors/anybody to break the bow to prove to be the best powerful emperor amongst all to marry his daughter Sita. So King Janak did not make any objection of caste system. So was the case of marriage of Draupadi where in the dress of a Brahmin Arjuna pierced the eye of the fish with arrow and Yudhistar married Draupadi. Draupadi was daughter of Khastriye, Rajput whereas in the dress, Yudhistar was Brahmin. So qualities are to be checked either of boy or girl.

DEEDS OF BRAHMIN

The deeds of the Brahmin are as follows, please-

To become learned by study of Vedas and present education, then it is taught to others; to perform Yajyen and enable others to perform it; to donate and to take donations.

Some of his duties are given below as mentioned in Manu Smriti shloka 1/88

i) To become learned by study of Vedas and present education,

ii) then it is taught to others;

iii) to perform yajyen,

iv) enable others to perform it

v) to donate

vi) to take donation