Here's just one example of my point: we have TBMs (tunnel boring machines) today, which were made possible by 19th and 20th-century industrial development. Duri

Here's just one example of my point: we have TBMs (tunnel boring machines) today, which were made possible by 19th and 20th-century industrial development. During the construction of the Hoover Dam, the original bypass tunnels were created by drilling and blasting, which resulted in a number of those deaths. If they had TBMs back then, many people would been spared exposure to dangerous rock dust, explosives, falling rocks, etc.