'Viewpoint Diversity': heterogeneity is critical to the integrity of science.

This editorial discusses the importance of maintaining diversity within science, noting especially its significance to research in psychiatry. It follows a recent directive that was issued by the US administration that places unreasonable constraints on US government-funded scientific inquiry. The article draws attention to the harmful intended consequences of the directive. It also discusses its unintended consequences, which are likely to be damaging because heterogeneity is inherent in nature, and recognition of diversity in medical science helps achieve specificity. This is essential for the detection and diagnosis of disease and for tailoring therapies and developing targeted treatments.