To My Deep Mortification My

[t]he Young And The Old Of Widely Different Races, Both With Man And Animals, Express The Same State Of Mind By The Same Movements.

An American Monkey, After Getting Drunk On Brandy, Would Never Touch It Again, And Thus Is Much Wiser Than Most Men.

... Not One Living Species Will Transmit Its Unaltered Likeness To A Distant Futurity.

Besides Love And Sympathy, Animals Exhibit Other Qualities Connected With The Social Instincts Which In Us Would Be Called Moral.

I Fully Agree With All That You Say On The Advantages Of Spencer's Excellent Expression Of 'the Survival Of The Fittest.' This, However, Had Not Occurred To Me Till Reading Your Letter. It Is, However, A Great Objection To This Term That It Cannot Be Used As A Substantive Governing A Verb; And That This Is A Real Objection I Infer From H. Spencer Continually Using The Words, Natural Selection.