The essay argues that postwar disenchantment exposed the fragility of civilised values and warns that technological advances, notably aerial and chemical weapons, have outpaced moral and political readiness, making international exchange of ideas essential to avert catastrophe. It criticises narrow national self-interest, advocates stronger institutions and networks to publicise developments and form common opinion, and urges scientists, engineers, and financiers to embrace a transnational ethic that resists weaponisation and promotes cooperative solutions. Practical proposals include transparent disclosure of military developments, professional international meetings, and cultural exchanges to build the public pressure needed to restrain destructive competition.