All of them evolved through a period of time.

Sign language is not the same everywhere, and they are not mutually intelligible:
ASL (American) in U. S. and Canada, and some other countries
BSL (British) in UK (ASL and BSL are not mutually intelligible)
LSF (French) in France (about 60% shared with ASL)
Spanish- no uniform system. Mexico, Colombia, etc.; each has its own.
CSL (Chinese)
etc.
There are 271 identified sign systems.