Eyewitness memory is important because it allows an additional point of view and also measures how much of the testimony is reliable.
Well the class structure was lords then samurais then farmers. How it stabilized society was it set a strict code to follow for each of the classes and they followed that. How it unified? I'm not so sure but my guess is that every person in each class fought for their power like the lords or for their land like the farmers.
Rule of force-No rules and people simply take what they want
First come-first served-When shoppers arrive when the store opens so they can buy all the goods on a sale at low prices
Gov't rules-the gov't decides who receives what and when
Markets- compete for more customer and higher profit,workers to compete for better jobs and larger incomes.
