<em>The Dynasty is famous for uniting china under one rule</em>.
2.
<em>Emperor Wen established the Sui Dynasty</em>
3.
<em>Three accomplishments are reuniting china under one rule, Building the Grand Canal which improved transportation and trade and reconstructing great wall of china.</em>
Relative deprivation theory was proposed by sociologist Robert K. Merton. There were four conditions required for the definitions of relative deprivation.
According to this theory, a person has not anything.
People were known by others who have something
Every person has something in their life.
Every person thinks that they have reasonable chances to have something.
Professor Crane's declining emotions were explained by relative deprivation theory.