It doesn't "keep happening", it's happened exactly twice, in the two industrial revolutions, in each case the new type of work that needed millions of human han

It doesn't "keep happening", it's happened exactly twice, in the two industrial revolutions, in each case the new type of work that needed millions of human hands was obvious. There is no guarantee that it will happen again, especially given that new industrial inventions require no human intervention at all. To fall back on an example that is not my own, imagine a conversation in 1900 between two horses: Horse 1: I'm worried about these new automobile things, they might take our jobs Horse 2: Don't worry, every technological development that displaced horse work in the past has led to more newer and better jobs for horses, there will always be work for us. Just look at trains, we don't have to pull big loads anymore, now we just draw carts and support riders, who knows what great jobs are just around the corner. The world's horse population peaked in 1915, and is now down by 70% in the US.