For 65 years, STEM majors have had the advantage. Now humanities are making a comeback. Thanks, of all things, to AI. The gap is one of the most documented facts in labor economics. NACE has tracked starting salaries by college major since 1960, and engineering grads have sat at the top of the table in every decade since. Georgetown measured the current gap last October. Prime-age workers with STEM degrees earn a median of $98,000 a year. Humanities majors earn $69,000. Now top Wall Street…