Reality

      Approximately 2.4 million American adults, or about 1.1 percent of the population age 18 and older, have schizophrenia, according to the National Institute of Mental Health. The onset of schizophrenia  often appears in late teens to early 30s. Although only diagnosed in early 20th century it has throughout humankind.
       This chronic, debilitating mental disorder is characterized by distortions of thinking and perception with primary aspect of psychosis. Schizophrenics have abnormal perception of reality with hallucinations and delusions. They often hear voices or see things which do not exist.
      Also about 1 in 20 people in the general (non-schizophrenic) population has experienced at least one hallucination in their lifetime that wasn't connected to drugs, alcohol or dreaming.
http://www.livescience.com/50999-hallucinations-delusions-common.html#
     These people reported hearing voices or seen things that didn't exist, or experienced a delusion (a false belief), such as the thought that their mind was being controlled or that they were being followed.

A LOT OF PEOPLE THROUGHOUT TIME MAKE THEIR OWN REALITY