I'd really like to safely write stuff like Special Relativity, Quantum Mechanics, Theory of Evolution without capitals; but I don't want to regret it, whence my question.
Should the name of scientific theories be written with capitals?
There are many theories of evolution; but one is so well known that the Theory of Evolution will be assumed to refer to Darwin's. Quantum mechanics, on the other hand, is a field of study, and doesn't need capitalization any more than physics does.
Homology Theory
with capitals? They're proper nouns as well.