infospace: process book-4-introduction

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/economic-system-effectiveness.md

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+<!-- generated: provider=openrouter model=arcee-ai/trinity-large-preview:free date=2026-02-19 source=book-4-introduction -->
+
+# Economic System Effectiveness
+
+## Definition
+
+The degree to which economic arrangements achieve their intended objectives, particularly the provision of subsistence for the people and the generation of sufficient revenue for public services, as measured by their outcomes and practical results.
+
+## Source Chapter
+
+Book IV, Chapter 0
+
+## Context
+
+Smith's framework for understanding political economy implies the importance of evaluating different systems based on their effectiveness in achieving the stated objectives of enriching both the people and the sovereign.
+
+## Economic Domain
+
+General Theory
+
+---