Tertullian was one of four early church fathers who wrote extensively on the subject of vegetarianism

Early Church Fathers
One of the greatest theologians in the early Christian church, Tertullian, or Quintus Septimius Florens Tertullianus, was born in Carthage about AD 155-160. Cyprian, the Bishop of Carthage, called him the "Master."

Tertullian was one of four early church fathers who wrote extensively on the subject of vegetarianism. According to Tertullian, flesh-eating is not conducive to the highest life, it violates moral law, and it debases man in intellect and emotion.