„'But why, if the wrongfulness of animal food was known to humanity so long ago, have people not yet come to acknowledge this law?' will be asked by those who are accustomed to be led by public opinion rather by reason.The answer to this question is that the moral progress of humanity -- which is the foundation of every other kind of progress -- is always slow; but that the sign of true, not casual, progress is its uninterruptedness and its continual acceleration. [...] And the progress of vegetarianism is of this kind. That progress is expressed in the actual life of mankind, which from many causes is involuntarily passing more and more from carnivorous habits to vegetable food, and is also deliberately following the same path in a movement which shows evident strength, and which is growing larger and larger -- viz. vegetarianism. “