For perspective, Steve's field is "Individualized Studies", and he made up his own specialization. There is really no point trying to try ranking different fields of study. How would one even define criteria for something like this? However, if one is forced to come up with a ranking, STEM fields would be pretty high up. PS: alternatively, the only real academic subjects are Physics and Theology, and all we'all just engage in pedestrian occupational training. Oh yeah, and grad school should be 12 years long, cloistered in a monastery.