Our ancestors were eating meat over 2.5 million years ago. We mainly ate meat, fish, fruits, vegetables and nuts. We have to assume our physiology evolved in association with this diet. The balanced diet for our species was what we could acquire then, not what the government and doctors tell us to eat now.
Lionel Tiger[Pleasure is what suggested] which behaviors, emotions, social patterns and patterns of taste served us well during our evolutionary history. They were experienced as pleasures and encoded into our formative genetic codes . . . deep in the past, from about 100,000 years ago and beyond.
Lionel TigerThere is a tendency for humans to consciously see what they wish to see. They literally have difficulty seeing things with negative connotations while seeing with increasing ease items that are positive. For example, words that evoke anxiety, either because of an individuals personal history or because of experimental manipulation, require greater illumination before first being perceived.
Lionel Tiger