The answer is: to keep the population isolated from freer societies.
Reception (sensation) sensory receptors detect the presence of a stimulus.
transduction (sensation) sensory receptors convert stimulus energy into electrochemical energy.
transmission (sensation) ...
selection (perception) ...
organisation (perception) ...
interpretation (perception) ...
sensation. ...
perception.
Mount Everest is the tallest at approximately 29,032 ft high
Emperors in Russia were called tsars.