The Theory of Evolution has been evolving for many years. However, the person usually credited with its "creation" is Charles Darwin.
Groove Theory was created in 1995.
Stevens Theory was created in 1917.
The HAB Theory was created in 1976.
Consistency Theory was created in 1200.
A Theory of Relativity was created in 2001.
A Theory of Everything was created in 2001.
Theory of Colours was created in 1810.
Abstract Theory was created in 2002.
The Theory of Everything was created in 2002.
Enochian Theory was created in 2004.
The Theory of Wages was created in 1932.
Prospect theory was created in 1979.