Central to this essay is the understanding that varied communities may have an inherent and unrecognised culture of their own and this culture may be detrimental to their core. Bioethics constitutes one such community and is embedded in norms and values comprising its own culture. I use exclusion of religion or simply ‘irreligion’ as an example of a cultural element that may be established and so shape the culture of bioethics. Irreligious bioethics includes both overt religious preclusion and the more (...) pervasive form of religious marginalisation. This norm is narrated into the culture of bioethics with justifications sustaining it. Irreligious bioethics is inadmissible as it claims illegitimate neutrality, is a misuse of expertise and results in a variety of harms. As bioethics is influential in society, those engaged should be critically reflective and aware of harmful cultural elements whilst also possessing the honesty, courage and capacity to change them. (shrink)