Grundidee
Grundidee is a German term that translates to "basic idea," "fundamental concept," or "core concept." It refers to the central, essential thought or principle behind a plan, theory, project, or work of art. It is the foundational element from which all other aspects are developed and to which they relate. The Grundidee is what gives a concept its identity and purpose.
In various contexts, the Grundidee serves as a guiding principle. For a scientific theory, it might be