Chastity is required for producing good population

Without good population in the society, gentlemen, cultured, educated,
following the rules and regulations of religious principles, how you can
expect peace and prosperity? That is not possible. So the whole Vedic system
was meant for having very good population. Not such kind of population who
are addicted to killing and drinking and so many other sinful activities.
… So to have good population, the women should be very chaste. That is the
basic principle of Vedic civilization. And to keep the women chaste, it was
the function of the responsible father, or, in the absence of father, the
elder brother… So he must get the woman, the girl, married. It is
compulsory. There was no compulsory for man to marry. Because a man may
remain brahmacari. By training, he can abstain from sex. But if woman is not
protected very strictly, it is very difficulti So therefore chastity is
very, very important thing for producing good population, nice population.
>>> Ref. VedaBase => Bhagavad-gita 1.40 — London, July 28, 1973