Genesis 1:29, “Then God said, “Behold, I have given you every seed-bearing plant on the face of all the earth, and every tree whose fruit contains seed. They will be yours for food.” Yes, Mankind was designed originally to be vegetarian in the pre—flood world. Post—flood, we may speculate that the need to consume meat is because there would be different vegetation which would not supply all of the nutrients necessary for mankind to be completely healthy.