Why The One Reality Hypothesis Fails is offered as an explanation why science has become divided between a set of data driven physical or hard sciences and a set of narrative driven social or soft sciences that few consider part of the scientific community anymore.
The problem is not the sciences, per se, so much as the reality these fields represent. The idea that reality is all one piece and all science studies the same substance, regardless of if they are a material science or part of the humanities. The reader can argue in defense of the One Reality Hypothesis, if they wish, but it is easily proved that an alternative hypothesis produces better results. The choice is between a reality that is logically incoherent and restricted to highly artificial environments, or a reality that hardens the soft science, and produces results in an environment that is far more humane.