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Causal Loop Diagram — Gilded Age Industrial Economy

Learning Objective

Interactive causal loop diagram of the late 19th-century U.S. industrial economy with three feedback loops — two reinforcing (growth and investment engines) and one balancing (regulatory brake). Click nodes and edges for historical context; use Find Loops and Trace mode.

  • Bloom Level: Analyze (L4) — Examine
  • Library: p5.js | Chapter: 1 — Historical Methods

Interactive Sim

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About This MicroSim

This systems-thinking diagram models the Gilded Age industrial economy as a set of causal relationships and feedback loops. Students click nodes (Industrial Output, Worker Wages, Consumer Demand, Corporate Profits, Capital Investment, Labor Unrest, Government Regulation) to read historical context, click arrows to read polarity explanations, and use Trace mode to step through each loop. The Analyze-level objective requires students to examine structure — not just observe outcomes.

Embed This MicroSim

<iframe src="https://dmccreary.github.io/us-history/sims/causal-loop-diagram-builder/main.html" height="562px" width="100%" scrolling="no"></iframe>

Lesson Plan

Duration: 20–25 minutes | Grade: High School | Subject: U.S. History / Historical Methods & Gilded Age

Before: Ask: "What caused the rapid industrial growth of the Gilded Age? How did workers, corporations, and government all fit into that system?"

During: Students click all nodes and edges to read context, then identify which loops were strongest (R2) and weakest (B1) in the actual Gilded Age.

After: Discussion: Why was the regulatory brake (B1) so weak in this period? What changed in the Progressive Era to strengthen it?

Extension: Students modify the diagram (verbally) to show the New Deal era — which links changed? What new nodes would you add?

References

  • Donella Meadows, Thinking in Systems (2008) — Foundational guide to reinforcing and balancing loops
  • Josephine Ziegler, Captains of Industry — Carnegie, Rockefeller, Morgan primary sources
  • Richard White, The Republic for Which It Stands: The United States during Reconstruction and the Gilded Age (2017)