““In string theory, the situation is very different. The law of motion dictates the laws of the forces. This is because all forces in string theory have the same simple origin-they come from the breaking and joining of strings. Once you describe how strings move freely, all you have to do to add forces is add the possibility that a string can break into two strings. By reversing the process in time, you can rejoin two strings into a single string (see Fig. 5). The law for breaking and joining turns out to be strongly prescribed, to be consistent with special relativity and quantum theory. Force and motion are unified in a way that would have been impossible in a theory of particles as points.””
![“String theory?[pause] It closed the conceptual gulp between relativity and…” quote by Willie Garson](https://sms4smile.com/quotes/img-quotes/5ac/willie-garson-55883_known_string-theory-pause-it-closed-the-concep_653676.jpg)
