Book (Practical) Society Simple and Rational Life Planning / rei Tachibana

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Ethics and Morals
The author rei Tachibana, who presented a model of a "happy life" in his previous book 『 Happiness's "Capital Theory" 』, which defined happiness as three capitals : "financial capital (assets)," "human capital" and "social capital". This time, he presented a innovation by adding the horizontal axis of "rationality" to the three capitals on the approach to "success" to achieve a "happy" life optimally and efficiently. Life is a series of trade-offs, and therefore choices are important. This book pursues "rationality" and "happiness" in living in modern society with many constraints, with appealing keywords such as "respa," which says that if the same result is achieved, there is less risk but better.