A system of ideas or ideals, especially one which forms the basis of economic or political theory and policy.

The underlying theory or set of beliefs that guide someone's actions or reasoning.

आधारभूत सिद्धांत

English Usage: The ideology behind the new policy was to promote sustainability.

Hindi Usage: नई नीति के पीछे का आधारभूत सिद्धांत स्थिरता को बढ़ावा देना था।