This is currently the most emailed story at the New York Times: it’s titled “3-D Printing Spurs a Manufacturing Revolution,” and it’s about how 3-D “printers” are moving from small-scale prototyping and model-making tools into full scale production, including a “printer” the size of a tractor trailer that can make foundations for houses.
I’m in architectural school right now, so I get to see these things in action. The slightly out-dated models they have here are ridiculously expensive but can ridiculously complex things - they can create shapes so complex they can hardly even be imagined without high-powered software. The only hard part is thinking up what to tell them to make, and once you’re there (within limits), you push a button and the machine does the rest.
To quote the times article, “Advocates of the technology say that by doing away with manual labor, 3-D printing could revamp the economics of manufacturing and revive American industry as creativity and ingenuity replace labor costs as the main concern around a variety of goods.”
Think about that for a second - these machines, if they continue to advance, could “revive American industry” - in part by eliminating labor. These things are very nearly Star-Trek style “replicators,” and more closely approximating them is clearly the direction things are going.
What we’re talking about here is a fundamentally new type of capitalism - one in which capital does not need labor, but labor still needs capital. This is likely to be the biggest economic issue of the 21st century - what happens when Say’s Law breaks down. Say’s Law states roughly that production creates its own demand - or, the act of producing product x requires hiring and paying wages and dividends roughly equivalent to the cost of the product, so increasing production automatically creates increased demand on a macro level, allowing the economy to grow organically.
This will no longer be true as we approach total automation. Increasing production might mean buying more 3-D printers, but not more designers and not more laborers. Production can be increased on both a micro and macro level without naturally creating increased demand simultaneously. Thus, a economic framework which was successful in the 20th century becomes instead a curse in the 21st, as labor saving advancement lead to lower levels of demand and hence stagnant or even reduced levels of production.
This is probably an unrecognized contributing factor to world-wide underemployment, wage stagnation and under-capacity production - and all the signs only point to it worsening. The question of the 21st century is how to create artificial demand in response to artificial production.