Dharma, or occupational duty, can be established in its full four parts as explained in Bhagavad-gītā. In Bhagavad-gītā (4.1) the Lord says:

imaṁ vivasvate yogaṁ proktavān aham avyayam vivasvān manave prāha manur ikṣvākave ’bravīt

“I instructed this imperishable science of yoga to the sun-god, Vivasvān, and Vivasvān instructed it to Manu, the father of mankind, and Manu in turn instructed it to Ikṣvāku.” This is the process of disciplic succession. Following the same process, the Kṛṣṇa consciousness movement is teaching the principles of Bhagavad-gītā as it is, without deviation, all over the world. If the fortunate people of this time accept the instructions of Lord Kṛṣṇa, they will certainly be happy in Śrī Caitanya Mahāprabhu’s mission. Caitanya Mahāprabhu wanted everyone, at least in India, to become a preacher of this mission. In other words, one should become a guru and preach the Lord’s instructions all over the world for the peace and prosperity of humanity.