History of string theory
| String theory | 
|---|
| Fundamental objects | 
| Perturbative theory | 
| Non-perturbative results | 
| Phenomenology | 
| Mathematics | 
The history of string theory spans several decades of intense research including two superstring revolutions. Through the combined efforts of many researchers, string theory has developed into a broad and varied subject with connections to quantum gravity, particle and condensed matter physics, cosmology, and pure mathematics.