This essay book created a social phenomenon in Japan. 4.5 million copies have been sold as of today and the book has been reprinted 124 times! It is without doubt one of the most successful books created this century.

The author Takeshi Yoro points out that people often think that they “know”
something just from the information they see on TV. And people often try to
find their own “uniqueness” to stand out, when actually, we all change as
human beings every day. These are the results of what he calls their wall of
ignorance. The wall of ignorance is defined as the wall or the limit which
each one of us runs into when trying to understand something. If you believe
that dialogue and interaction leads to understanding but have been
unsuccessful at communicating with someone, this concept of all humans
having their own “wall” may relieve you from a bit of stress. A specialist of
anatomy, Takeshi Yoro that explains in this essay what it means to be
intelligent from the perspective of neuroscience and how this “wall of
ignorance” heavily affects us at the individual, interhuman and global level.