A person concerned with the theoretical aspects of a subject; a theoretician
An expert in or practitioner of game theory.
An advocate of a race theory.
An expert in or advocate of a field theory.
A person who specializes in or studies macro-theory; (specifically in Economics) a macroeconomic theorist.
A person who studies mathematical number theory.
An advocate or exponent of queer theory.
A believer in the identity theory.
A person who theorizes about literature; an expert in or student of literary theory.
A student of or expert in music theory.
A person who theorizes about politics; an expert in political theory.
A believer in or advocate of the quantity theory of money.
An expert or specialist in quantum theory.