In order to deeply grasp the current western democratic crisis characterized by right-wing populism, we need to turn to the perspective of“democratic sociology”. Mutual acceptance constitutes the premise of public negotiation based on communication rationality, and social inequality will cause serious social tears and directly affect the mutual acceptance among social members. The rise of right-wing populism in the West is, to a large extent, the product of the“structural coupling”and mutual construction as well as restriction of the two major distinctional mechanisms of nation-state and capitalism in the era of globalization. For Western countries, the way out of overcoming the democratic crisis depends on reshaping the social foundation of their political solidarity. This requires not only the promotion of distributive justice at the domestic level, but also the creation of the“international politico-economic law”to promote distributive justice at the international level.