Kṛṣṇa consciousness movement is very scientific movement. Unless you raise the population from the animal propensities, how you can expect peace? Do you think is there any peace in the dog society, in the cat society? No, it is not possible. You keep some dogs. They meet. As soon as they meet together there will be howling—"gow, gow, gow, gow." So you cannot expect. If you create dog society, then you cannot expect. You have to create a portion, a certain percentage of the population, brahmins. Then there is possibility.
Just like in the sky the numerical strength of the stars are greater, but there is one moon. That one moon is sufficient to illuminate the sky. Ekaś candras tamo hanti na ca tara sahasrasaḥ. Millions of millions of stars twinkling, they cannot dissipate the darkness. You see? Only one moon, only one sun. So try to make some percentage of the population actually brahmin. Go-brāhmaṇa-hitāya ca. And protect the cows.
Actually, we are taking so much advantages. So from the cows, the milk. And from the milk we can make hundreds of vitaminous foodstuff. Hundreds. They're all palatable. So such a nice animal, faithful, peaceful and beneficial. After taking milk from it, if we kill, does it look very well? Even after the death, the cows supply the skin for your shoes. It is so beneficial. You see. Even after death.
While living, he gives you nice milk. You cannot reject milk from the human society. As soon as there is a child born, milk immediately required. Old man, milk is life. Diseased person, milk is life. Invalid, milk is life. So therefore Kṛṣṇa is teaching by His practical demonstration how He loves this innocent animal, cow.
So human society should develop brahminical culture on the basis of protecting cows. The brahmin cannot take any other food except it is made of milk preparation. That develops the finer tissues of the brain. You can understand in subtle matters, in philosophy, in spiritual science. Just like in a scientific college, not ordinary man can understand the scientific intricacies.
They require some preliminary qualification to enter into the scientific college. They require some preliminary qualification to enter into the law college, in the postgraduate classes. Similarly, to understand the subtle or finer implications of spiritual science, one has to become brahmin. Without becoming brahmin it is not possible.
Therefore in the Bhagavad-gītā it is said, cātur-varṇyaṁ mayā sṛṣṭaṁ guṇa-karma-vibhāgaśaḥ (BG 4.13). There are four classes of men created by God: cātur-varṇyaṁ. How they are divided? How the classification is made? Guṇa-karma-vibhāgaśaḥ, by classification of quality and work. Not by birth. In India, of course, this classification of guṇa-karma-vibhāgaśaḥ was originally planned from the Vedic age. But later on, a class of men, without any qualification, without any practical work, they claimed that "I belong to such-and-such class." Therefore India's falldown was inevitable.