To help the reader gain an appreciation of Lonergan’s achievement of **Modern Macroeconomic Field Theory** we will, in each section, print leading excerpts, then highlight the key concepts of those excerpts. We will comment on the historically-significant advances in geometry of Euclid and Hilbert, in physics of Newton and** **Einstein, and in macroeconomics of Lonergan.

- Euclid’s great achievement was his rigorous
**deduction** of geometry.
- Hilbert’s great achievement was his employment of
**implicit definition** to reorder Euclid’s geometry.
- Newton’s two great achievements were unifying the isolated insights of Galileo and Kepler into a
**unified system** of mechanics and his invention of the calculus.
- One of the great achievements of Einstein was the invention of the
**field theories** of Special Relativity, General Relativity, and Gravitation.
- One of Lonergan’s
**several** great achievements was his **systematization** of macroeconomic phenomena in his **Modern Macroeconomic Field Theory. **He combined the technique of **implicit definition** introduced by Hilbert and the concept of a **field theory** developed by Faraday and Einstein; and he developed an **explanatory macroeconomics**, which is **general, invariant, and relevant in any instance**.** (Continue reading)**

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