In the Vedic culture, those who are meat-eaters, they have been advised that "Don't eat meat purchased from the slaughterhouse or from the market." Actually, this system was never current anywhere, all over the world, that to maintain slaughterhouse. This is latest invention. We talk with sometimes with Christian gentlemen, and when we inquire that "Lord Christ says, 'Thou shall not kill'; why you are killing?" they give evidence that "Christ also ate meat sometimes." Sometimes Christ ate meat, that's all right, but did Christ say that "You maintain big, big slaughterhouse and go on eating meat?" There is no common sense even. Christ might have eaten. Sometimes he… If there was no…, nothing available for eating, what could you do? That is another question. In great necessity, when there is no other food except taking meat… That time is coming. In this age, Kali-yuga, gradually food grains will be reduced. It is stated in the Srimad-Bhagavatam, Twelfth Canto. No rice, no wheat, no milk, no sugar will be available. One has to eat meat. This will be the condition. And maybe to eat the human flesh also. This sinful life is degrading so much so that they will become more and more sinful. Tan aham dvisatah kruran ksipamy ajasram andhe-yonisu [Bg. 16.19]. Those who are demons, those who are sinful, nature's law is to place him in such condition that he will become more and more a demon, so that he will never be able to understand what is God. This is nature's law. If you want to forget God, then God will put you in such a condition that you can never understand what is God. That is demonic life. That time is also coming. At the present moment, still a few men are interested what is God. Arto artharti jijnasu jnani [Cc. Madhya 24.95]. But time is coming ahead when there will be no sense to understand God. That is the last stage of Kali-yuga, and at that time Kalki avatara, Kalki avatara will come. At that time there is no preaching of God consciousness, simply killing. Simply killing. Kalki avatara with His sword will simply massacre. Then again Satya-yuga will come. Again golden age will come.

From Srila Prabhupada's lecture on Bhagavad-gita 2.6 — August 6, 1973, London