The Last Harvest by John Burroughs

Columbus discovered America; Edison invented the phonograph, the incandescent light, and many other things. If Columbus had not discovered America, some other voyager would have. If Harvey had not discovered the circulation of the blood, some one else would have. The wonder is that it was not discovered ages before. So far as I know, no one has yet discovered the function of the spleen, but doubtless in time some one will. It is only comparatively recently that the functions of other ductless glands have been discovered. What did we know about the thyroid gland a half-century ago? All the new discoveries in the heavens waited upon the new astronomic methods, and the end is not yet. Many things in nature are still like an unexplored land. New remedies for the ills of the human body doubtless remain to be found. In the mechanical world probably no new principle remains to be discovered. "Keely" frauds have had their day. In the chemical world, the list of primary elements will probably not be added to, though new combinations of these elements may be almost endless. In the biological world, new species of insects, birds, and mammals doubtless remain to be discovered. Our knowledge of the natural history of the globe is far from being complete.

But in regard to inventions the case is different. I find myself speculating on such a question as this: If Edison had never been born, should we ever have had the phonograph, or the incandescent light? If Graham Bell had died in infancy, should we ever have had the telephone? Or without Marconi should we have had the wireless, or without Morse, the telegraph? Or, to go back still farther, without Franklin should we ever have known the identity of lightning and electricity? Who taught us how to control electricity and make it do our work? One of the questions of Job was, "Canst thou send lightnings, that they may go, and say unto thee, Here we are? " Yes, we can. "We are ready to do your bidding," they seem to say, "to run your errands, to carry your burdens, to grind your grist, to light your houses, to destroy your enemies."