Why do we need to unify gravity with the other three forces?

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    Forces Gravity
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Discussion Overview

The discussion revolves around the need for unifying gravity with the other three fundamental forces of nature. Participants explore theoretical implications, the nature of forces, and the challenges posed by phenomena such as black holes. The scope includes conceptual and theoretical considerations.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the necessity of unifying gravity with the other forces, suggesting that gravity could be viewed as an effect of the geometry of space-time rather than a fundamental force.
  • Another participant argues that unification is not essential, noting that previous attempts at unification have led to more elegant theories, but it remains possible that gravity cannot be unified with the other forces.
  • A third participant highlights a significant issue regarding the compatibility of quantum theory and general relativity, particularly in the context of black holes.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and feasibility of unifying gravity with the other forces, indicating that multiple competing perspectives remain without a consensus.

Contextual Notes

The discussion touches on unresolved issues related to the nature of gravity, the implications of black holes, and the potential contradictions between quantum mechanics and general relativity.

Green dwarf
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I am wondering why gravity needs to be unified with the other three forces into a super-force. Why can't the three forces be seen as interactions between particles in a space-time fabric whose geometry gives the impression of gravity?
 
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It doesn't need to be unified with the other three forces. It's just that unification has, so far, led to increasingly accurate and arguably more 'elegant' theories. It's entirely possible that gravity simply cannot be unified with the other fundamental forces.
 
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A basic problem is the inside of a black hole. Quantum theory and general relativity are in contradiction.
 
Thanks Drakkith and mathman. That makes sense, especially now that I've read a bit more about black holes.
 

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