This is not a religious call, though the world's fleshly religions have as part of the taught teachings, but in the early 21st century, it is more of a human call. Solidarity is one of the body values, stressing that global challenges need to be managed in a way that distributes costs and spills fairly, in accordance with the fundamental principles of equality and social justice. In the context of globalization and the challenge of growing inequality, strengthening solidarity and international co-operation is indispensable for the realization of the Development Goals.