Fundamental Theory of on the Origin of Species

This page is the CodyCross answer for the clue below from Taking Care of Our Planet, Group 1576, Puzzle 1 (Greenhouse Gas).

Question is: Fundamental Theory of on the Origin of Species

and the answer is: DARWINISM

Word Meaning:

DARWINISM — Alternative letter-case form of Darwinism.

Definitions from Wiktionary.