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One of the great puzzles of the industrial revolution is why it began in England. Why not France, or Germany? Many reasons have been offered. Britain had plentiful supplies of coal, for instance. It had a good patent system in place. It had relatively high labor costs, which encouraged the search for labor-saving innovations. In an article published earlier this year, however, the economists Ralf Meisenzahl and Joel Mokyr focus on a different explanation: the role of Britain’s human-capital advantage—in particular, on a group they call “tweakers.” They believe that Britain dominated the industrial revolution because it had a far larger population of skilled engineers and artisans than its competitors: resourceful and creative men who took the signature inventions of the industrial age and tweaked them—refined and perfected them, and made them work.
In 1779, Samuel Crompton, a retiring genius from Lancashire, invented the spinning mule, which made possible the mechanization of cotton manufacture. Yet England’s real advantage was that it had Henry Stones, of Horwich, who added metal rollers to the mule; and James Hargreaves, of Tottington, who figured out how to smooth the acceleration and deceleration of the spinning wheel; and William Kelly, of Glasgow, who worked out how to add water power to the draw stroke; and John Kennedy, of Manchester, who adapted the wheel to turn out fine counts; and, finally, Richard Roberts, also of Manchester, a master of precision machine tooling—and the tweaker’s tweaker. He created the “automatic” spinning mule: an exacting, high-speed, reliable rethinking of Crompton’s original creation. Such men, the economists argue, provided the “micro inventions necessary to make macro inventions highly productive and remunerative.”...
