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I have called this principle by which each slight variation if useful is preserved by the term natural selection.

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But when on shore, & wandering in the sublime forests, surrounded by views more gorgeous than even Claude ever imagined, I enjoy a delight which none ...more

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Light may be shed on man and his origins.

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When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Cambria...more

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Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher ...more

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As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existe...more

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None can reply - all seems eternal now. The wilderness has a mysterious tongue, which teaches awful doubt.