Solidarity, understood as a sense of unity that translates into actions of social cooperation, emerges as one of the imperatives of the twenty-first century, especially as a demand tied to the case of the refugees. The ongoing humanitarian migration crisis, seized in the broader global context of the rise of intolerance and anti-immigration discourse, alluded to a crisis of solidarity. Understanding that the concept of solidarity itself is in crisis, this research intends to explore the contours of human solidarity by using the archetype of the refugee as paradigmatic, justified by the epistemic privilege regarding the necessary contact with otherness that unavoidably presents itself. Solidarity must be reconstructed in normative terms through the concept of otherness rather than sameness; this consideration is essential for the reinvigoration of the concept. To do so, I will present a general overview of solidarity, in connection with the figure of the refugee and the current crisis. Subsequently, I will introduce a few contemporary theses of human solidarity based on Judith Butler s formulations, exploring key concepts such as precariousness, grievability and cohabitation.