Last Saturday I attended a Battle of Ideas debate on whether or not food can be moral. It's an interesting question for libertarians, particularly when you try to consider the extent to which the non-aggression principle can apply to other animals. Some take a purist approach and consider all animal life to be inviolable. Others take the position that eating another animal is fine, so long as you didn't support the system that put it on your plate by buying it. This could have been a debate on exercising personal morality, using the power of the consumer to gradually change trends.