Being a Christian, I will mention the Bible. It tells us that even though we were created among the animals, we are not animals; we have souls, and we should not often compare ourselves to others who do not, but we were given sovereignty over them, so we were called to protect the creatures of the Earth, but our needs come first, and we need meat to live. According to the Bible, carnivoration is a punishment; when Adam caused the first sin, God bestowed on all creation the act of competition for survival. Now, the survival of species relies on the death of the unfit. Compared to the overall death and birth of animals, our consuming them is futile.