Employees bring their beliefs and religious values to work, and this can be a source of either positive performance or negative conflict. Social conflicts around religion impact more than societies and communities. They also impact organizations. ‘Anti-religion’ sentiments tend to be based on the perception that religion can be neatly separated from the ‘more acceptable/palatable’ spirituality, but this ignores the fact that – for most people – the two are intimately intertwined and inseparable. As religious identity is salient for a majority of the world’s population, it is thus an important aspect of organizations – particularly those with a large and diverse body of employees. This handbook provides a timely and necessary analysis of religious diversity in organizations, investigating the role of national context, the intersections of religion with ethnicity and gender, and approaches to diversity management.