I agree that theories should change when incorrect. Eintstien's theories have been subject to revision because of observed events in the universe.
However, Global Warming and Evolution's theories never need revising based on observed events, these events simply get explained as evidence to support the theory.
That is why these theories are superior, they never have to say they are sorry. What grand theories compared to the poor old relativity theory.
Exactly what observed event or physical evidence do you believe exists that contradicts or supersedes the Theory of Evolution? If there isn't any, and the theory keeps succeeding in providing a consistent explanation of available data, it must be pretty good theory, no?