Editing Mansfield Amendment (1969) (section)

== The Resulting Stagnation ==

* Particle physics: The last major addition to the Standard Model Lagrangian that was not already anticipated in the 1960s was the charm quark (November Revolution, 1974) — arguably the last gasp before full stagnation set in. Since 1973/74, zero new fundamental particles or forces have been discovered beyond the 1970s roadmap. The Higgs (2012) and top quark (1995) were predicted; nothing unexpected has appeared.
* Theoretical physics: [[Quantum Gravity]], particularly the [[String Theory]] program (promising unification in 1984) has dominated for 40+ years and produced zero testable predictions. Every other approach is starved. [[String Theory]] was claimed for decades to be [[The Only Game in Town (TOGIT)]]. In addition to Eric Weinstein, [[Sabine Hossenfelder]], [[Peter Woit]], [[Lee Smolin]], and others document that the field has been in crisis since the 1970s — i.e., the Mansfield era.
* The [[The Golden Age of General Relativity]] ended abruptly. The community that had been aggressively pursuing unified field theories, alternative gravities, and (quietly) propulsion-relevant modifications simply disappeared from open literature after 1973–1975.