Halakhah su Genesi 9:3

Rav Judah stated in the name of Rav, "Adam was not permitted meat for purposes of eating as it is written, 'for you shall it be for food and to all beasts of the earth' (Genesis 1:29), but not beasts of the earth for you. But when the sons of Noah came [He] permitted them [the beasts of the earth] as it is said, 'as the green grass have I given to you everything' (Genesis 9:3)."

In point of fact, this talmudic dictum is simply a terse statement of the relevant law prior to the time of Noah but is silent with regard to any validating rationale. While the statement in question may well be compatible with a vegetarian ideal, it may quite readily be comprehended as reflecting entirely different considerations. Indeed, the classic biblical commentators found entirely different explanations for the change which occurred with regard to dietary regulations. Thus, for example, R. Jacob ben Asher, renowned as the author of the Tur Shulḥan Arukh, in his commentary on Genesis 1:29, explains that, prior to partaking of the fruit of the Tree of Knowledge, Adam lacked any desire for meat; only subsequent to eating of the forbidden fruit did man acquire a carnivorous nature. Hence the dispensation granted to Noah to eat the flesh of animals simply reflects man's transformed biological needs. R. Meir Leibush Malbim, in his commentary on Genesis 9:3, remarks that Adam was endowed with a "strong" constitution and that the produce available in the Garden of Eden was nutritionally optimal in nature. Under such circumstances, Adam's dietary needs could be satisfied without recourse to meat. Only as mankind degenerated physically as well as spiritually, became geographically dispersed and hence subject to the vagaries of climate, and as the quality of available produce became nutritionally inferior, did it become necessary for man, in his "weakened" state, to supplement his diet with animal products in order to assure the availability of the nutrients required for his biological needs.

(2) A number of medieval scholars, including R. Issac Abarbanel in his commentary on Genesis 9:3 and Isaiah 11:7, and R. Joseph Albo, Sefer ha-Ikkarim, Book III, chapter 15, regard vegetarianism as a moral ideal, not because of a concern for the welfare of animals, but because of the fact that the slaughter of animals might cause the individual who performs such acts to develop negative character traits, viz., meanness and cruelty. Their concern was with regard to possible untoward effect upon human character rather than with animal welfare.²See also R. Abraham I. Kook, Iggerot Re’iyah (Jerusalem, 5722), II, 230.