To men like Albert Schweitzer's fellow Alsatian, though unknown to him, Alfred Kastler the belief that, since "modern "nationalist" man" is obsolete (Norman Cousins), the future of post-modern man depends on the development of planetary solidarity before it is too late would be almost a truism.²¹⁰ But very few people have come to think and feel in terms of "we humans", rather than "we Americans' or "we Soviet Russians", whenever a major international crisis arises. In expressing loyalties, the closest rather than the most comprehensive community usually takes precedence, so that world citizenship remains a vague idea as long as there is no world city in which to practice it.