How does Chapter 38 compare the primary virtues across different cosmic ages (Yugas) and what is highlighted for the present time?

As detailed in Chapter 38, the text draws upon the scriptures of human duty to outline the primary virtues for different cosmic ages. It specifies that penance was the principal means in the Krita age, knowledge in the Treta age, and sacrifice in the Dvapara age. For the current era, the Kali age, the chapter clearly states that charity is the preeminent virtue. It then goes further to specify that among all forms of charity, the regular practice of food donation (Annadan) is the foremost and highest secret for quenching hunger, making it the most important deed for people to practice in this age.