It is the impertinence of a dense ignorance for any of us to say what is in or what is to be in the order of nature.
It is a stupid blunder to look back at the little we know of the past, and say that it is the unerring index finger telling us what is to be in the future.
If this planet has been what geology teaches it has been,--a planet fuller of coarser, cruder, and more violent forces than now; abounding in forms of coarser vegetable, animal, and ev...
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