noun
theory; principles
Refers to the fundamental theory or principles of a field, often used in academic or formal contexts. Commonly appears in compound titles like 経済原論 (principles of economics).
経済原論の授業で基礎理論を学んだ。
I learned basic theory in the principles of economics class.
この本は教育学の原論を体系的に解説
This book systematically explains the principles of pedagogy.
Compound of 原 (gen, 'origin' or 'fundamental') and 論 (ron, 'argument' or 'theory'). The term is used to denote the foundational theory of a discipline.