This book proposes that countries which are economically developed or are quickly developing speak languages that contain high concentration of evolutionary alarm/warning call sounds. These sounds automatically stimulate early brain structures making the people in those societies more aroused, worried and cautious. These are essential features for economic development that cannot be educated.
Positive Illusions are gaps in reality which traditionally define mental illness. Could it be perhaps these gaps in reality may possess of a positive benefit in regards to an increase in self-esteem? Two arguments exist one stating balanced self-evaluations are simply a sign of depression and a second stating high self-esteem cannot be viewed as the onset of illusioned thinking.