The Lord is the protector of cows and the brahminical culture. A society devoid of cow protection and brahminical culture is not under the direct protection of the Lord, just as the prisoners in the jails are not under the protection of the king but under the protection of a severe agent of the king. Without cow protection and cultivation of the brahminical qualities in human society, at least for a section of the members of society, no human civilization can prosper at any length.

From Srimad-Bhagavatam 1.14.34 purport