infospace: process book-3-chapter-04

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/commercial-family-duration-pattern.md

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+
+# Commercial Family Duration Pattern
+
+## Definition
+
+The observation that very old families possessing considerable estates for many
+generations are rare in commercial countries but common in countries with little
+commerce, explained by the tendency of commercial wealth to dissipate through
+extravagant personal spending while simple agricultural societies maintain
+wealth within families.
+
+## Source Chapter
+
+Book III, Chapter 4
+
+## Context
+
+Smith's final observation on the social effects of commerce, noting that
+commercial countries see wealth dissipate through vanity and lack of bounds on
+personal expense, while simple nations maintain family wealth through the
+consumable nature of their property.
+
+## Economic Domain
+
+General Theory
+
+---