There was an error in my post on technological unemployment last night. It confused % manufacturing jobs with # manufacturing jobs. Correcting this makes it less clear there has not been gradual manufacturing decline since 1960 correlating with PAMFLPR decline. See post for more.
One thing that changed recently is that the amount of labor needed to automate something went down a lot. Manufacturing the McCormick reaper took a lot more people than building Craigslist and probably clobbered around the same # of jobs.