The reason America needs more political diversity in the social sciences is not because moderates and conservatives in academia need an affirmative action-style spoils system. Rather, it’s because the knowledge-creation process—the system by which scientists create knowledge and that knowledge is disseminated to the public and incorporated into political decisions—functions better if there is disagreement and debate among the scientists. Findings are more robust if they have been repeatedly challenged and refined over time.
Conservatives upset with the state of academic research have often emphasized the way non-progressives are discriminated against [and] suppressed in many fields. And that may be true. But a more productive approach may be to highlight the way that their absence undermines the integrity of science itself—and, in the long run, the quality of public policy decisions. [source]