Presenting some modern views on the problem of the nature of mind and its relationship to the brain, this book, published in 1965, brings together contributors from various disciplines which are affected by this issue. Coming from different philosophical outlooks as well as subjects, these contributors also comment on each other’s’ chapters with a view of developing thought on the approaches to the problem. The theory of mind-brain relationship is vital to human interest and has been in debate throughout western thought over centuries, split mainly into dualist and monistic theories. These discussions had and still have wide impact philosophy, psychology, religion and cosmology, among other areas.