Hierarchy problem and grand unification
https://en.wikipedia.org/wiki/Hierarchy_problem
https://courses.lumenlearning.com/physics/chapter/33-6-guts-the-unification-of-forces/
Electroweak Theory and the Origin of the Fundamental Forces video
fine tuning
Hierarchy Problem | Higher Dimensional Physics first 10 mins
What's Fine-Tuning in Physics? | Episode 1903 | Closer To Truth
http://www.scholarpedia.org/article/Grand_unification
- Franck Wilczek
1998 BEYOND THE STANDARD MODEL: AN ANSWER AND TWENTY QUESTIONS
1980? UNIFICATION OF FUNDAMENTAL FORCES