Well, that's just the very old argument that "Necessity is the mother of invention". But I can tell you that there are historians of technology who think that is a silly aphorism. A different and possibly more truthful version says that "Invention is the mother of necessity." Example: When automobiles were invented, they could not become truly useful until a whole host of subsidiary inventions and institutions sprang up. You needed gas stations, and paved roads, and glass manufacturers, and tire manufacturers, and so forth. Sadly, inventions don't always come about just because we 'need' them; that's about like supposing that the U.S. cavalry will always come riding to the rescue just in the nick of time, like in all the old-time Westerns. China desperately NEEDED inventions in the 17th and 18th centuries, when they had lost their earlier inventiveness, did not get them, and the result was massive famines.......