Theories of Everything: The Quest for Ultimate Explanation by John D Barrow

If such a theory were discovered it would reveal the complete form of the most basic Laws of Nature, from which all others follow as particular simple cases. This book lays out and examines the different ingredients that are required to claim a full understanding of the physical universe that we observe, and shows how their status is being dramatically changed in modern physics and what aspects of them can or cannot be explained by a Theory of Everything.

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