Current events converge on the theme of otherness, an important point often made by blood and hate, but also by solidarity and love. Promoted by globalization and sharpened by the "identity awakening", the dramas of development, or of poverty, the idea of “otherness” is the unifier of the passions of our contemporary world. Bringing together philosophy and theology, political science and history, sociology and law, these hommages to Alfred Grossner explore the spaces where recognition and exclusion are formed and expressed.