“The conflict of theories, leading, as it eventually must, to the survival of the fittest, is advantageous.” ScienceTheoryConflictSurvivalSurvival Of The Fittest Book:Presidential Address by Grove Karl Gilbert: With Constitution and Standing Rules, Abstracts of Minutes and Lists of Officers and Members, 1895 Source: Presidential Address by Grove Karl Gilbert: With Constitution and Standing Rules, Abstracts of Minutes and Lists of Officers and Members, 1895