Philosophers of science have in recent years presented arguments in favour of increasing cognitive diversity, diversity of social locations, and diversity of values and interests in science. Some of these arguments align with important aims in contemporary science policy. The policy aims have led to the development of institutional measures and instruments that are supposed to increase diversity in science and in the governance of science. The links between the philosophical arguments and the institutional measures have not gone unnoticed. Philosophers (...) have even explicitly suggested that institutional measures could be used to increase diversity in science. But philosophical criticisms of the existing institutional instruments have also been presented. Here I review some recent case studies in which philosophers examine actual attempts to increase diversity in science by using institutional measures implemented from the top down—attempts that have failed in one way or another. These studies examine attempts to involve citizens or stakeholders in the governance of science and technology and attempts to increase the number of interdisciplinary collaborations. They draw attention to the limitations of such instruments, calling into question the most optimistic visions of using institutional instruments to increase diversity in science. (shrink)