It's worth noting that Peter Thiel has also advanced a version of this argument (progress stagnant since 1970): http://www.technologyreview.com/qa/530901/techno

It's worth noting that Peter Thiel has also advanced a version of this argument (progress stagnant since 1970): http://www.technologyreview.com/qa/530901/technology-stalled-in-1970/ http://www.technologyreview.com/qa/530901/technology-stalled... along with Tyler Cowen (low hanging fruit has been picked, specifically in the US): https://en.wikipedia.org/wiki/The_Great_Stagnation https://en.wikipedia.org/wiki/The_Great_Stagnation