Brāhmaṇa means the intelligent man. So we should pick up the intelligent men. They should be trained as brāhmaṇa. Those who are martial, having fighting spirit, they should be selected as kṣatriya. Those who are for increasing money, mercantile mentality, they should be also collected. Similarly, śūdras. And they should be trained, everyone, to satisfy Kṛṣṇa. Varṇāśrama-vibhāgaśaḥ. Svanuṣṭhitasya dharmasya saṁsiddhiṁ hari-toṣaṇam (SB 1.2.13).