Authentic sources are good, but they of course contain "subjective truths" relative to the era they were written in. Apparently Buddha wasn't too concerned about meat eating in 500 B.C.; but, given his teachings on compassion, interdependence, and mindfulness, I imagine he would be more concerned in today's world of environmental degradation and overpopulation. The world population back then was around 100 million humans; today in the US alone there are over 300 million people, and 7 billion worldwide. Literally 70 times as many people today as in Buddha's era. Of course, back then, there wasn't the widespread environmental degradation that we see today, some of which can be attributed to the production of commercial meat. Livestock 2,500 years ago was raised on small, local, organic farms (as that's all there was); or livestock was just free-ranged across the countryside (much like wild game today). Today, in contrast, most meat you find in a grocery store comes from large animal feeding operations where upwards of 5,000 animals are crammed head to ass in a building, standing in their own feces for most of their lifetime and fed antibiotics so they don't get sick in those inhumane conditions. And given hormones to make them grow faster or produce more milk. And the waste from those 5,000 concentrated animals causes widespread pollution of our air, water, and soil. It makes me sick to my stomach to drive past those large feedlots here in Iowa and to think people are eating that meat; it looks so clean and healthy in that cellophane packaging! Today, we also have over 1 billion people worldwide without enough food to eat. Meat production is a very inefficient use of food resources; for beef, only 10% of animal protein is converted into beef protein. So, 10 pounds of plant protein is required for that one pound hamburger. IMHO that 10 pounds of plant protein should instead be eaten directly by humans instead of feeding a cow; multiplied across the globe that would be more than enough extra food to feed those 1 billion hungry folks. That is the problem I have with the logic "Buddha ate meat, so it's OK for me too" (not saying that is your logic, but I have heard that said about both Jesus & Buddha, in an effort to justify someone's eating of meat). IMHO such devotion to historical "authentic sources" that condone meat eating can reduce one's mindfulness of present conditions in today's world. Not eating meat from factory farms is one easy way to reduce our ecological footprint. Do you think Buddha would have embraced reducing our ecological footprint? Have you seen the movie Food, Inc? (excellent food for thought on this topic) Or King Corn? (which was filmed in Iowa and gives a good idea of the environmental issues in our state) Have you read Barbara Kingsolver's book Animal, Vegetable, Miracle?