Sedentary agriculturalists face higher costs for aggression than mobile pastoralists do.

Evidence

This is quite different from the relationship between agricultural sedentary producers, who can steal the harvest but cannot easily steal the fields. If they wish to enslave the people they defeat, they land themselves with grave problems of labour management. So the appeal of aggression for agricultural producers is much less, unless they are effectively centralized and can monopolize the means of coercion, and possess the machinery for controlling the subjugated population. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 1922

Categorization

• XREF: This contrast explains why pastoralism needs tribe-level trust (Hardin’s observable constraints) while settled agriculture can defer to central coercion—a useful structural comparison for the reader’s synthesis.