The present moment in human history is marked by the ever-accelerating movement across the world of materials, peoples and information, creating various problems and, of course, opportunities as well – especially, the movement of the people, which makes multiculturalism a major issue. Differences between the immigrants and the receiving society create conflict. One solution would be found in the legal provision for the equality of rights for all the members of society, including cultural minorities, but if the legal solution alone is considered effective, there would be waste of resources accumulated in cultures as enabling agents of amenable human life. But multiple cultures in a single society easily become a source of conflict, as another culture encroaching upon one's own culture is often felt as a threatening challenge to one's identity, as identity is constructed in the subjective process of culture. It implies the master-and-slave struggle between two subjectivities. Cultural subjectivities, personal or collective, could be induced to constitute a complex system of federated subjectivities. Even such a system would not, however, completely eliminate tension and conflict. Intervention by an ethic universally conceived on the minimal basis would meet the urgent need to prevent escalation of conflict, but it would ultimately prepare a common ground for the development of a global culture incorporating multiple cultures as historically inherited resources for enrichment of human life. Ethical awareness is what reveals the otherness of the other and also the ontological ground of human life on earth; as ethics and epistemology coincide, a human reason would emerge as the ground of a new global culture, and the world would hopefully become a single Lebensraum for entire humanity.