The world will be saved, and you will be saved, and Kṛṣṇa will be pleased. Brāhmin's business means that people should know what is God, what is our relationship with Him. That is brāhmin's . . . and kṣatriya's business is to give protection to the people so that they may all know what is God. That is kṣatriya's . . . and vaiśya's business is to provide food for them, production. And śūdra's is to help all these three classes by their labor. This is social order.
It is not that everyone will become brāhmin or everyone will become kṣat . . . no. At the present moment, the Communists are trying, "Everyone should be Communist." That is not possible. You cannot make everyone of the same class. No. That is not possible. You have to use your intelligence in such a way that these four division can work cooperatively and become perfect.
And that is suggested here, svanuṣṭhitasya dharmasya saṁsiddhir hari-toṣaṇam (SB 1.2.13). That common platform means how to please Kṛṣṇa. Never mind you are brāhmin, you are kṣatriya, you are vaiśya. But so long we are in the material world, there must be four divisions. The kṣatriyas should give protection; otherwise the demons will disturb. So there is necessity of war with the demons, for kṣatriya. So these three classes are required, brāhmin, kṣatriya, to give protection. And as soon as the social system is organized, the perfectional point is to satisfy Kṛṣṇa, or the Supreme Lord.