Doing so would guarantee economic stagnation and a permanently ugly politics where liberal democracy itself would be at risk. More specifically, society should view with great skepticism new efforts by the California Teamsters to stop autonomous trucks. First, if self-driving trucks are anywhere near as safe as self-driving cars, that’s a massive public benefit. Third, as a world of self-driving trucks draws nearer, even fewer people might seek these jobs, reducing job losses through attrition. Some 60 percent of American workers today are employed in new types of jobs that didn’t exist in 1940.