The need for protection according to Vedic principles.

1. The protection of the brāhmaṇas maintains the institution of varṇa and āśrama, the most scientific culture for attainment of spiritual life.

2. The protection of cows maintains the most miraculous form of food, i.e., milk, for maintaining the finer tissues of the brain for understanding higher aims of life.

3. The protection of women maintains the chastity of society, by which we can get a good generation for peace, tranquillity and progress of life.

4. The protection of children gives the human form of life its best chance to prepare the way of liberty from material bondage. Such protection of children begins from the very day of begetting a child by the purificatory process of garbhādhāna-saṁskāra, the beginning of pure life.

5. The protection of the old men gives them a chance to prepare themselves for better life after death.

Source : https://vedabase.io/en/library/sb/1/8/5/