The theory of use and disuse was proposed by
Lamarck
The theory of use and disuse was proposed by Lamarck. He suggested that changes in traits or characters occur in organisms depending on whether an organ is used or disused continuously. Continuous use of an organ, according to Lamarck, would also result in the inheritance of that organ by the next generation, while constant disuse of an organ would gradually result in degeneration of the organ over time.