System of Ideas Used to Justify Actions

This page is the CodyCross answer for the clue below from Fauna and Flora, Group 164, Puzzle 5 (Pyramid of Biomass).

Question is: System of Ideas Used to Justify Actions

and the answer is: IDEOLOGY

Word Meaning:

IDEOLOGY — Doctrine, philosophy, body of beliefs or principles belonging to an individual or group.

Definitions from Wiktionary.

System of ideas used to justify actions — CodyCross Answer | CodyCross Solutions